The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness.
The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.
Heat transfer via electromagnetic waves.
the energy or rays sent out when certain changes happen in the atoms or molecules of an object or substance; light, heat, radio waves, and X rays are forms of radiation
Transfer of energy through electromagnetic wave motion, such as being warmed by a campfire.
The process by which heat is emitted from a body through open space, like sunlight.
The emission of particles or rays by the nucleus of an atom.
The harmful combination of waves and particles, known as high energy rays, emitted from a source.
the movement and emission of waves, atomic particles, etc., through space
energy given off as either particles or rays from the unstable nucleus of an atom Why Are Some Atoms Radioactive? Can Unstable Atoms Become Stable?  [ Click "BackButton" for previous location
Energy propagated through space or matter in the form of waves, such as sound, light, radio, X-rays and cosmic rays. Also see X-ray.
The passing of heat from one body to another by electromagnetic waves. Radiated heat should not be confused with convected or conducted heat. The heat of the sun is radiated through 'empty' space, where convection and conduction would be impossible.
The flow of energy across open space via electromagnetic waves such as light. Passage of heat from one object to another without warming the air space in between.
the transfer of energy through space by electromagnetic waves.
Transmission of energy through space or any medium. Also known as radiant energy.
emission of rays of light, heat or other electromagnetic waves, emission (of light, heat or sound) from a center, diverge or cause to diverge or spread from a center, parts radially arranged, in rays.
Form of energy or energetic particles capable of causing changes in a molecule e.g, ionizing (creating charged particles) radiation such as X-and gamma rays, and nonionizing radiation such as UV.
The transmission of energy by electromagnetic waves or particles.
Electromagnetic energy emitted by all objects (including the sun, of course) in amounts related to the temperature of the object.
Radiation occurs naturally. It is a type of energy that travels through space in the form of waves, or particles, which give up all or part of their energy on contact with matter. Radiation can take the form of alpha or beta particles, X-rays or gamma rays, or neutrons.
Energy in the form of particles or waves given off by certain atoms. Familiar forms of radiation are heat, light, radio waves and microwaves. Ionizing radiation is a very high-energy form of radiation. It is invisible and cannot be sensed without the use of special equipment. Ionizing radiation can cause cell damage.
Sun's rays that are reflected (radiated). Also radiation from nuclear activity
The transfer of heat directly from one surface to another (without heating the intermediate air acting as a transfer mechanism).
Energy radiated or transmitted in the form of particles as rays or waves.
Transfer of heat energy through space. A worker whose body temperature is greater than the temperature of the surrounding surfaces radiates heat to these surfaces. Hot surfaces and infrared light sources radiate heat that can increase the body's heat load.
Particles or rays emitted by radioactive substances from the unstable nuclei of their atoms. (See alpha particle, beta particle and gamma ray)
process of emitting energy in the form of waves or particles; sunlight is solar radiation
Power existing in various wave rates and lengths. Believed to be the carrier of spirit communication with sensitives. This force is immune to material insulation and passes through solid substances. It is not explained by physical laws and is generally accepted as being of the supernormal.
energy transfer by energetic particles (in this case photons and neutrinos). 27. Analyzing Starlight
Waves or streams of particles that carry energy.
Mobile phones emit radio frequency (RF) radiation, which some studies have suggested may have implications for safe mobile phone use. Mobile phone radiation levels are measured as SAR values.
Energy emitted from some object.
In the context of the RReDC, synonymous with electromagnetic radiation, or the energy produced by an oscillating electrical (and magnetic) field, transmitted by photons. See Electromagnetic Spectrum.
The emission of energy in the form of electromagnetic waves or the outward flow of energy from any source that takes the form of radio waves.
energy radiated or transmitted as rays, waves, in the form of particles recycle - to take old materials and turn them into usable materials
particles and/or waves emitted by a body.
The transfer of energy by waves. Humans and other life forms can become very ill or even die from exposure to too much of certain types of radiation.
Fast-moving particles (particulate radiation) or waves of energy (electromagnetic radiation). See alpha particle, beta particle, gamma rays.
The emission of energy or of particles of matter. A very broad term that refers to electromagnetic waves or fast-moving atomic particles such as electrons, beta particles and alpha particles. Electromagnetic waves include gamma radiation, X-rays, visible light, microwaves, infrared waves, ultraviolet radiation, and radio waves.
Electromagnetic waves; emission of electromagnetic waves; or energy transfer by particles (such as alpha particles). (Greenfield, 1987, p. 215)
The mechanism for transfer of heat from a solid surface (such as a component) by electromagnetic transmission.
The emission and propagation of energy in the form of waves.The term, when unqualified, usually refers to electromagnetic radiation, such as infrared, visible light, ultraviolet, X-ray, or gamma ray. It can also refer to corpuscular emissions, such as alpha and beta radiation.
the direct transport of energy through space by means of electromagnetic waves.
the application of high powered x-rays to a certain part of the body in order to kill or injure the cancer cells. Often radiation is used along with chemotherapy to treat cancer.
The transfer of heat by direct rays from your body to cooler objects around you.
Any form of energy that spreads or radiates from its source, including heat, light (visible, ultraviolet and infrared), gamma rays and x-rays. Only a few forms of radiation are radioactive.
Energy given off by atoms when they are moving or changing state. Can take the form of electromagnetic waves, such as heat, light, X-rays, or gamma rays, or streams of particles such as alpha particles, beta particles, neutrons or protons. See background radiation, ionizing radiation.
is used here to denote electromagnetic waves of any wavelength. It includes, in order of descending wavelength, radiowaves, microwaves, infra-red, visible light, ultra-violet, X-rays, and gamma-rays.
This is the electromagnetic radiation emitted by a body as a function of its temperature. The idealised body is a black body, this being one which absorbs all radiation that impinges on it. Stefan's law states that the total energy radiated per unit time per unit surface area of a black body is proportional to the fourth power of the temperature (kelvins) of the body. T4 where = Stefan's constant = 5.67x10-8Wm-2K-4 See also: Heat, Physical Constants. Search for thermodynamics books on Amazon.co.uk
Energy that moves through space in the form of particles or electromagnetic waves.
the transfer of heat from the surface of one object to the surface of another without contact between the two objects
the transport of heat in the form of electromagnetic waves.
Spontaneous disintegration of radioactive elements (e.g. Co-60, Ra-226, Cs-137) into other elements, accompanied by the radiation of high energy and harmful y-rays. If a radioactive material is melted in the electric arc furnance, Co-60 is the most likely radioactive element to be alloyed with the steel due to its close melting point, while Cs-137 ends up in the dust and Ra-226 in the slag. NatSteel Asia screens all incoming scrap via a radiation detection system before it is charged into the furnace. Steel samples from the furnace, billets and our steel products are also tested at the lab with a radiation measurement unit. NatSteel Asia adopts a stringent limit of 0.1Bq/g (the International Atomic Energy Agency recommends 0.3Bq/g) of total radioactivity in all of its products.
rays of heat and light given off by the sun..... return
The passage of heat from one object to one other without warming the space between.
1. Transfer of heat between bodies without a change in the temperature of the intervening medium. 2. Any release of energy from its source.
The emission and propagation of energy through space or matter, distinguished by the fact that the speed of propagation equals that of light and requires no intervening medium for its transmission. Any form of energy propagated as rays, waves, or streams of particles; especially light and other electromagnetic waves, sound waves, and the emissions from radioactive substances. See alpha particle, beta particle, gamma ray, neutron generator, gamma ray source, and neutron source.
Usually refers to the radiant energy emitted by certain elements (such as radium, uranium, plutonium, thorium, and their products). Radiation is often in the form of alpha particles, beta particles, or gamma rays. See; Radioactivity, Alpha Particle, Beta Particle, Gamma Ray.
the emission of particles which can penetrate into materials and skin, and have the potential to cause genetic damage.
the combined processes of emission, transmission, and absorption of radiant energy
In terms of this set of essays, radiation is what is ejected from a nucleus when an atom decays. There are three types of radiation, Alpha, Beta and Gamma.
In wireless, the conversion of the conducted RF signal in the transmitter to radio waves that can be propagated over distance.
Any kind of energy that is emitted from a source in the form of rays or waves, for example, heat, light or sound.
THIS IS THE TRANSFERENCE OF WARMTH (OR HEAT) BETWEEN TWO DIFFERENT SURFACES, FROM ONE TO THE OTHER AS ELECTROMAGNETIC WAVES.
transfer of energy in the form of electromagnetic waves or associated photons Strahlung
The emission of waves transmitting energy through space or a material medium, such as water. Light, radio waves, and x rays are all forms of radiation.
Act of giving off electromagnetic energy.
(1) Transfer of heat through electromagnetic waves from hot to cold. (2) Electromagnetic waves of energy having frequency and wavelength. The shorter wavelengths (higher frequencies) are more energetic. The electromagnetic spectrum is comprised of a) cosmic rays, b) gamma rays, c) x-rays, d) ultraviolet rays, e) visible light rays, f) infrared, g) microwaves and h) radio waves.
Transfer of energy (heat/sound) from one object to another through an intermediate space. Only the object receiving the radiation, not the space is heated. The heat is in the form of low frequency, infrared, invisible, light energy, transferring from a "warm" object to a "cold" object. It is known as the "black body effect".
Heat that moves out in waves from a central point and heats objects in its path. The closer you get to a source of radiant heat the more heat you will feel.
the propagation of energy; for the purposes of this text primarily restricted to the propagation of acoustic energy through a medium [as opposed to electronic radiation (such as light, electricity, radio waves, etc.), which does not require a medium]. Although primarily propagated by the vibration of a solid surface, acoustic radiation can also be generated by other means (see text).
treatment with high energy X-rays to kill cancer cells. Radiation can be used in low doses to diagnose breast cancer and in high doses to treat breast cancer.
In the context of optics, electromagnetic energy is released; the process of releasing electromagnetic energy.
energy that is radiated or transmitted in the form of rays or waves or particles
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
a form of hazardous energy, severe delta-rays emitted from a star, can interfere with ships sensors as well
Another word for transmission of radio waves into the air.
High-energy rays which are used to kill or damage cancer cells.
The giving off of electromagnetic rays, such as X-rays, and the use of such rays to diagnose and treat disease.
Heat transfer process in which energy is transferred in electromagnetic waves form or photons.
The flow of energy through open space via electromagnetic waves, such as visible light.
In astronomy, energy sent out from a source as light (photons).
A mode of energy transport whereby energy is transmitted through a vacuum.
transmission of heat or energy by electromagnetic waves, such as heat transmitted by an electric heater and absorbed by a disjoined substance
Replace existing definition with: 1) The process of transmitting radiant energy in the form of waves or particles. Ionizing radiation is often used to kill microorganisms in sterilization procedures. 2)Radiant energy or a radiant beam, such as visible light, infra-red light, ultraviolet light, X-rays or gamma rays.
Energy that passes from a warm object to a cooler one, like energy from the Sun to the Earth - sunlight.
high-energy rays or particle streams used to treat disease.
Radiant energy given off by x-ray machines, radioactive substances, rays that enter the Earth’s atmosphere, and other sources.
Latin radiatus = radiant; hence, divergence from a common centre (cf. radius).
A general term for the release of energy in a "wave" or "ray" form. All light is radiant energy or radiation, as is heat, UV, microwaves, radio waves, etc.
The process of the emission of energy in the form of waves or particles. Radioactivity The property of radionuclides of spontaneously emitting ionising radiation.
The transfer of heat by direct rays traveling through space to a solid substance, but without heating the air (similar to light rays). Your body loses heat through radiation to cold windows and to cold uninsulated walls, ceilings, and floors. If walls themselves are cold, your house may be uncomfortable, even though the air temperature is as high as 75 or 80
High-energy waves used to destroy cancer cells and prevent recurrence.
Energy that is propagated through space in waves or particles. Some common forms of radiation are x-rays, microwaves, light, and radio waves.
the situation at high frequencies, where electric and magnetic fields are coupled together in a specific relationship so that they propagate through space carrying energy. Usually negligible at power frequencies
Measured two ways: in disintegration at the source and in dose absorbed. Measured in becquerels or curies, it is nuclear particles and rays emitted by decaying atoms in a radioactive source as they change to more stable forms. A roentgen or coulomb is a measurement of X- or gamma-radiation, which produces positively and negatively charged ions in gas. A gray (another term is rad) is a measure of radiation energy, in joules, deposited in or absorbed by the body. A rem is a biological dose equivalent measurement that qualifies a gray (or rad), with other mitigating factors. A dose of 600 rem will usually result in death within 60 days.
High-energy emissions from X rays, gamma rays, neutrons, and other sources.
The emitted particles and photons from the nuclei of radioactive atoms; a shortened term for ionizing radiation or nuclear radiation as distinguished from nonionizing radiation (microwaves, ultraviolet rays, etc.).
Electromagnetic energy, such as radio waves, traveling forth into space from a transmitter.
The transfer of energy by the electromagnetic waves.
process of releasing energy as particles or waves from a central source outward
a beam of energy similar to x-rays that is used to stop cancer cells from growing or dividing.
the process of emitting radiant energy in the form of waves or particles. Radiation can be used as therapy to stop cancer cells from growing and dividing.
The emission and propagation of electromagnetic energy through space.
(thermal) the transfer of thermal energy via electromagnetic waves
Treatment to kill cancer cells using high-energy rays from x-rays, electron beams, or radioactive isotopes.
A wave of energy sent across space. Examples include heat and light energy
heat transport by diffusion of photons: dominates where temperature gradients are fairly small.
The transfer of heat by direct rays traveling through space to a solid substance, but without heating the air (similar to light rays). An example is the sun warming the earth. Radiant heat can also be reflected (via a mirror) or absorbed (through dark clothing).
The transfer of heat by radiation (such as energy transfer). The process of emitting radiant energy in the form of waves or particles (such as particle emission).
a method of heat transfer in which heat is transmitted from surface to surface via infrared waves. Radiant heat warms the surfaces it touches without increasing the temperature of the air through which it travels. All warm bodies radiate infrared energy.
the release of energy in the form of electromagnetic waves. Often used to describe the release of harmful substances during the production nuclear energy
the transfer of heat by wave movement through air or a vacuum (such as space)
Electromagnetic fields emitted by a source.
electromagnetic waves (in astronomical usage)
Rays of energy. Gamma rays and X-rays are two of the types of energy waves often used in medicine. The use of energy waves to diagnose or treat disease. See also: Irradiation.
The transfer of heat by electromagnetic waves (example: heat from the sun).
refers to electromagnetic energy, not to be confused with “radioactivity” (the emission of radiation, generally alpha or beta particles from the nucleus of an unstable isotope).
The transfer of heat through space via electromagnetic waves (radiant energy). A campfire can warm you even if there is wind between you and the fire, because radiation is not affected by air.
A variety of types of energy, such as X-rays and ultraviolet.
a form of energy that allows your doctor to see blood vessel structures and other anatomy inside your body; X-rays and CT scans use radiation to "take pictures" of the inside of your body.
Energy propagated through space or a material medium.
Used as a synonym for electromagnetic radiation.
heat, light, or elementary particles - the most simple parts of matter produced by an object.
Radiation is the transfer of heat or energy from a hot surface to a cold surface through air or through a vacuum.
The emission or release of energy in the form of waves or rays.
Particles and electromagnetic raysor waves emitted from the nucleus of an atom during radioactive disintegration.
Propagation of energy in free space by virtue of joint, undulatory variations in the electric or magnetic fields in space, (i.e., by electromagnetic waves). Transfer of heat in straight lines through a gas or vacuum other than by heating of the intervening space.
light or energy such as from the sun that travels through the air.
ray-dee-Ay-shun] Energy waves which can be used to diagnose (e.g. chest x-rays) or treat diseases (e.g cancers).
Strictly speaking, radiation means giving off any energy particles or waves and includes heat and light. But usually used to mean radioactivity. This means gamma rays, alpha or beta particles from a radioactive source. The radioactivity comes from the breakdown of atoms. The source can be natural or made in a nuclear reactor. Uncontrolled radiation can be dangerous and cause cancer. Controlled exposure to radiation can be used in medicine for diagnosis (eg X-rays) or to treat cancer (radiotherapy).
Particles (alpha, beta, neutrons) or photons (gamma) emitted from the nucleus of an unstable (radioactive) atom as a result of radioactive decay.
energy moving in the form of particles or waves. Familiar radiations are heat, light, radio waves, and microwaves. Ionizing radiation is a very high-energy form of electromagnetic radiation.
A way in which energy is transferred from place to place in the form of a wave. Light is a form of electromagnetic radiation.
use of high-energy radiation from x-rays, neutrons, and other sources to kill cancer cells and shrink tumors.
As it pertains to heat transfer, radiation is the exchange of thermal energy via the emission and reception of photons. Depending on the temperature of a given object with respect to its environment, the net energy transfer may be either into the object or away from the object. If the object is cooler than its surroundings, it will receive more energy that it emits. The opposite is also true. The level of energy compared to conduction and convection is generally low in the PC world due to small differentials between objects. Radiation depends upon an object's size, shape, temperature, and emissivity.
Energy emitted from the unstable nuclei of radioactive isotopes.
This refers to the process of heat traveling via infrared or heat rays from a warm object to a cooler object. Radiant heat loss accounts for a large percentage of the heat loss in windows. Radiant heat gains occur when sunlight shines through a window and warms objects inside.
The emission of neutrons, alpha particles, beta or gamma rays from a radioactive source.
In cancer treatment, use of x-rays, gamma rays, and alpha and beta particles to destroy cancer cells.
electromagnetic rays, including X-rays and ultraviolet light.
Depends on the context in which it is being used. Normally refers to electromagnetic radiation. It is also used in terms of fire protection, see "fire resistance" and it is one of the ways in which heat can be transferred.
The transmission of heat via radiant energy.
There are three types of nuclear radiation: (1) alpha, (2) beta, and (3) gamma. Radiation is the cause of one of the six types of harm (see TRACEM) that can be encountered at a terrorist incident. (Referring to nuclear radiation, not radiation as a type of heat transfer).
The transfer of heat in the form of electromagnetic waves from one separate surface to another. Energy from the sun reaches the earth by radiation, and a person's body can lose heat to a cold window or skylight surface in a similar way.
Heat transfer by way of electromagnetic energy.
there are different types of radiation ionizing radiation (atomic energy, sun) and non-ionizing radiation (microwave, radar). Ionizing radiation is measured in rads. If a person comes into contact with a high dose of ionizing radiation (above 1000 rads) it can harm the body and even can cause death. Everybody comes into contact with low levels of radiation through the sun and x-rays.
(In Radio Terms) The action of Electromagnetic Waves travelling away from an aerial. Radiation can be either Directional, Multi-Directional or Omni-directional. Poor connections and other factors can cause radiation to occur from other sources instead of the aerial.
Transmission of heat through space by wave motion; passage of heat from one object to another without warming the space between, such as sun light.
The movement of electromagnetic energy in the form of particles, rays or waves.
The spreading of usually harmful energy waves â€“ most often referring to nuclear energy.
Electromagnetic energy, such as light waves, x-rays, infrared and thermal waves traveling through a medium or through space.
Means by which electromagnetic energy (infra red) is absorbed into the more superficial tissue layers.
The process by which electromagnetic waves carry energy from one place to another. The transferred energy is a form of heat.
Energy transferred through space or other media in the form of particles or waves. In this document, we refer to ionizing radiation that is capable of breaking up atoms or molecules. The splitting, or decay, of unstable atoms emits ionizing radiation.
Any heated surface loses heat to cooler surrounding space or surfaces through radiation. The earth receives its heat from the sun by radiation. The heat rays are turned into heat as they strike an object which will absorb some or all of the heat transmitted.
Energy propagated through space. For the purposes of radiation protection the term is limited to the following kinds of radiation: (1) Electromagnetic radiation (x rays, gamma rays) and (2) corpuscular emission from radioactive substances or other sources (alpha, beta particles and neutrons).
Radiation is energy in the form of waves or particles. Radiation comes from sources such as radioactive material or from equipment such as X-ray machines, or accelerators. X-rays and gamma rays are electromagnetic waves of radiation, as is visible light. Particulate radiation includes alpha and beta particles. The energy associated with any radiation can be transferred to matter. This transfer of energy can remove electrons from the orbit of atoms leading to the formation of ions. The types of radiation capable of producing ions in matter are collectively referred to as "ionizing radiation".
Emission of electromagnetic particles, such as alpha particles (helium ions) released during alpha radiation
some type of electromagnetic wave: radio, microwave, light (infrared, visible or ultraviolet), x-rays or gamma rays are all types of radiation.
It is a term for the emission of alpha, beta, or gamma rays.
(1) the process by which radiated energy moves through space or material media; (2) energy propagated through space or through material media in the form of an advancing disturbance in electric and magnetic fields (e.g., visible light, x-rays, microwaves, radio waves, infrared radiation, ultraviolet waves, cosmic rays, etc.)
Rays of energy. The term "radiation" also refers to the use of energy waves to diagnose or to treat disease.
anti-cancer therapy or treatment using high-energy rays beamed to the tumor site to destroy cancer cells
The word 'radiation' has two different meanings, which can be confusing. First, there is electromagnetic radiation. This is thought of as travelling as 'waves' through space. Light, radio waves, X-rays, infrared and ultraviolet rays are all kinds of electromagnetic radiation. This is what astronomers are usually talking about when they refer to 'radiation'. Second, there is 'ionising radiation' the radiation that we associate with radioactive materials and nuclear power. Much of this is actually sub-atomic particles: neutrons, protons and electrons. Gamma rays, which are also produced by nuclear processes, can be thought of either as 'ionising radiation' or as a very short wavelength kind of electromagnetic radiation.
the transportation of heat from one place to another by waves or particles (The Earth is warmed by the Sun due to radiation.)
The emission of energy from an object. Heat waves from the object radiate to cooler objects. Like radio waves, this form of energy passes through the air without heating it. It becomes heat only after it strikes and is absorbed by a dense material.
Heat energy travels through a vacuum by radiation.
The propagation of energy in the form of electromagnetic waves.
The process by which energy is emitted as particles or waves.
Treatment with high-energy rays (such as X-rays) to kill or shrink cancer cells. The radiation may come from outside of the body (external radiation) or from radioactive materials placed directly in the tumor (internal or implant radiation). Radiation therapy may be used to reduce the size of a cancer before surgery, to destroy any remaining cancer cells after surgery, or, in some cases, as the main treatment.
The energy output of an object, usually expressed with the wavelength band such as infrared (3-20 µm), mi crowave (1-50 cm), net (all wavelengths), ultraviolet (2000-4000 Å), visible (400-700 nm), etc.
Sterilization using either gamma rays or an electron beam to destroy micro-organisms. Radiation sterilization normally takes place in a sealed irradiator unit.
This is the transfer of heat by means of invisible rays, which travel outwards from the hot object, without needing a medium.
The transferring of energy through electromagnetic waves.
Energy carried by waves or a steam of particles.
Emission or transfer of energy in the form of electromagnetic waves or particles.
Emission and propagation and emission of energy in the form of rays or waves.
The transfer of energy by waves, such as infrared or light waves.
Energy emitted in the form of electromagnetic waves. Radiation has differing characteristics depending upon the wavelength. Radiation from the Sun has a short wavelength (ultra-violet) whilst energy re-radiated from the Earth's surface and the atmosphere has a long wavelength (infra-red).
The emission and propagation of energy through matter or space by means of electromagnetic disturbances that display both wave-like and particle-like behavior; in this context the "particles" are known as photons. Also, the energy so propagated. The term has been extended to include streams of fast-moving particles, such as alpha- and beta-particles, free neutrons, and cosmic radiation. Nuclear radiation is that emitted from atomic nuclei in various nuclear reactions, including alpha-, beta-, and gamma-radiation and neutrons.
Any electromagnetic or particulate radiation capable of producing ions, directly or indirectly, by interaction with matter. Examples are x rays, photons, charged atomic particles and other ions, and neutrons.
(noun) The flow of atomic and subatomic particles and of waves, such as those that characterize heat rays, light rays, and X rays.
Uses high-energy X-rays, electron beams, or radioactive isotopes to kill cancer cells without exceeding safe doses to normal tissue. It does this by ionization. Some cells die immediately after the radiation due to direct effect, but most die because the radiation damages the chromosomes and DNA so that they can no longer divide. There is limited usefulness for radiation in liver cancer patients. It is usually used in combination with surgery, if at all, and can treat the liver area after a tumor has been removed. Currently, radiation is used as a way to decrease the pain associated with larger liver masses and metastases.
See electromagnetic radiation.
Heat transfer by Radiation takes place in the form of electromagnetic wave. These waves do not need medium for transfer. Heat radiation has a range of wave length. Heat from Sun reaches the earth by radiation.
Release of energy through the decay of unstable atoms.
The emission or propagation of energy through matter or space by electromagnetic disturbances which display both wave-like and particle-like behavior. Though in this context the "particles" are known as photons, the term radiation has been extended to include streams of fast-moving particles. Nuclear radiation includes alpha particles, beta particles, gamma rays and free neutrons emitted from an atomic nucleus during decay.
Treatment to destroy cancer cells and the immune system using high-energy rays from-rays, electron beams, or radioisotopes
The carrying of energy by waves. These waves are part of the electromagnetic spectrum.
light rays emitted from the sun in the form of ultraviolet A, ultraviolet B, and ultraviolet C spectrums.
Energy transmitted from a heat source to the air around it; radiators actually depend more on convection than radiation
Radiation is energy in the form of high speed particles and electromagnetic waves. Radiation is encountered by us everyday (i.e. ultraviolet, microwave, television) but these examples do not cause ionizations of atoms because they do not cary enough energy to separate molecules or remove electrons from atoms.
A general term referring to energy travelling in the form of waves, such as (a)electromagnetic waves, (b) particles,such as those emitted during radioactive decay (a and b ).
Energy dispersion through matter or space. In atomic physics this term is also extended to fast moving particles (alpha and beta radiation, free neutrons, etc.)
The process of energy transfer from a hot surface to surrounding surfaces that are not in direct contact. The energy transfer is due to the flow of electromagnetic radiation.
Energy carried by waves or a stream of particles.
High energy particles or rays emitted during the nuclear decay processes.
A form of ionizing energy.
Energy traveling through space. Some types of radiation associated with radioactivity are alpha and beta particles and gamma and X rays.
the transfer of heat by emitting waves of energy
energy released in the form of tiny particles or waves. Neutron radiation occurs when an atom splits. 1. Alpha radiation travels only a few inches in the air. It can be stopped by a sheet of paper. 2. Beta radiation, discharged from the nucleus of an atom, can be stopped by a thin sheet of metal. 3. Gamma radiation is caused by electromagnetic waves discharged from the nucleus of an unstable atom. It is basically the same as X-rays and can be stopped with lead or concrete.
Wave energy transmitted directly from one object to another through the atmosphere or through transparent or translucent materials. The energy radiated is transmitted, absorbed, reflected or a combination of all three.
Energy released in the form of particles or electromagnetic waves. Common sources of radiation include radon gas, cosmic rays from outer space, and medical x-rays.
Heat transfer by infrared radiation through space (air or vacuum) from a warmer mass to a cooler mass.
Electromagnetic emissions; in lasers it is in the form of light, either ultraviolet, visible, or infrared. TV waves, Radio waves, and X-rays are all examples of electromagnetic radiation. Note that the term radiation does NOT imply radioactivity.
a radio frequency (RF) radiation emitted by cell phones or other wireless devices, which some studies have suggested may have implications for safe mobile phone use.
Energy carried by particles from a radioactive substance or spreading out from a source. Radioactivity
Energy in the form of electromagnetic waves or particles capable of damaging cells by removing electrons from atoms or molecules. This damage can lead to cancer or other defects.
Radiation has two different meanings. One is the stream of particles emitted by decaying nuclei such as uranium. This energy often takes the form of alpha or beta particles, or neutrons. A second use is as part of the term “electromagnetic radiation," which refers to energy traveling in the form of electromagnetic waves or photons. For example, yellow light is a form of electromagnetic radiation, as are radio waves and x-rays.
The use of directed high-energy X-rays to kill cancer cells
Electromagnetic waves (gamma rays and X-rays) and particles (alpha particles, beta particles, neutrons) produced by nuclear fission and fusion processes.
Energy transmitted through space as waves or particles.
for our purposes, electromagnetic radiation, in particular, x-rays.
Heat that is emitted as electromagnetic radiation from any body not at absolute zero.
Radiation is energy in the form of waves or particles (see types of radiation). Radiation comes from sources such as radioactive material or from equipment such as X-ray machines, or accelerators. back to
energy that is radiated either in the form of electromagnetic waves or particles. Radiation includes energy and particles released from the nucleus of atoms.
treatment that fights tumours with high-energy x-rays
The transmission of energy through space. The term also applies to the radiated energy itself. Different types of radiation include electromagnetic radiation and acoustic radiation.
Energy in the form of electromagnetic waves. Various forms of radiation have different characteristics, depending on the wavelength. (see "shortwave radiation" and "longwave radiation.")
Energy emitted in the form of electromagnetic waves. Radiation has differing characteristics depending upon the wavelength. Because the radiation from the sun is relatively energetic, it has a short wavelength (ultra-violet, visible, and near infrared) while energy radiated from the Earth's surface and the atmosphere has a longer wavelength (e.g., infrared radiation) because the Earth is cooler than the sun. ()
Energy carried by waves or by streams of particles. Various forms of radiation can be used in low doses to diagnose disease and in high doses to treat disease.
Energy in the form of high-speed particles (ionizing) or electromagnetic waves (nonionizing).
Usually refers to electromagnetic waves, such as light, radio, infrared, X-rays, ultraviolet; also sometimesused to refer to atomic particles of high energy, such as electrons(beta-radiation), helium nuclei (alpha-radiation),and so on.
1. Heat transformed by electromagnetic waves. 2. A net exchange of radiant energy between two bodies or objects, across an open space.
Energy radiated in the form of waves or particles; photons.
Energy emitted in the form of waves or particles.
Energy that is emitted in the form of electromagnetic waves. The electronics of Galileo's camera system are sensitive to radiation, and Jupiter's radiation can affect the images Galileo sends - similar to "snow" on a television with poor reception - which is referred to as "noise."
The transfer of heat in the form of electromagnetic waves from one separate surface to another. Low-E glass is designed to reduce this type of heat transfer by reflecting electromagnetic waves.
Way that energy moves as a wave (p. 132-134). Also refers to energy released by radioactive elements (p. 209).
The emission and propagation of energy through space or through matter in the form of particles or waves.
The emission and propagation of energy by means of electromagnetic waves or particles. (cf ionising radiation)
(ionizing radiation) means alpha particles, beta particles, gamma rays, x-rays, neutrons, high-speed electrons, high-speed protons, and other particles capable of producing ions. Radiation, as used in this manual, does not include non-ionizing radiation, such as radio- or microwaves, or visible, infrared, or ultraviolet light.
the process of heat transfer by means of infra-red radiatins, a form of electromagnetic wave. Electromagnetic waves do not need any material medium for their propagation. Space is almost completely empty, so the sun's heat cannot reach us by conduction or convection. Because electromagnetic waves don't need a medium they are able to travel through space. Anything above the temperature of absolute zero is able to emit and absorb infra-red radiations. Radiation is absorbed by darker surfaces and reflected by lighter surfaces. This is why people wearing darker clothing in the summer are hotter than thoose wearing white or light clothing. Those wearing black will absorb the radiaions, therefore their temperature will rise.
The process of emitting energy as waves or particles. The energy thus radiated. Frequently used for ionising radiation except when it is necessary to avoid confusion with non-ionising radiation.
Refers to nuclear radiation, not radiation as a type of heat transfer. There are three types of nuclear radiation: 1) alpha, 2) beta, 3)gamma. Radiation is the cuase of one of the six types of harm that can be encountered at a terrorist incident.
The transmission of energy by means of electromagnetic waves. Radiant energy of any wave length may, when absorbed, become thermal energy and result in an increase in the temperature of the absorbing body.
(ray-dee-AY-shun) Energy waves given off by certain substances or generated electronically that can be used to diagnose or treat a disease. When used for treatment, these waves can be directed to a tumor in order to destroy or inactivate it.
Heat transfer of energy in the form of electromagnetic waves. Forms of radiation include cosmic rays, gamma rays, x-rays, ultraviolet radiation, infrared, visible light, radio, audio, and sub sonic. Radiometer An instrument which measures radiation levels. Such an instrument can be calibrated in power or temperature.
A form of energy, consisting of massless particles called photons, that travel at the speed of light, and of which visible light itself is a special kind of radiation.
The transfer of heat by radiation (e.g., energy transfer). The process of emitting energy in the form of waves or particles (e.g., visible light, X-rays).
Heat flow without contact between the hot and cold materials. Also, heat flow by electron flow, even across a vacuum.
(electromagnetic radiation) Energy that travels through space at the speed of light and moves by the interaction of electric and magnetic fields. This radiation transports energy.
The emission and/or propagation of energy through space or through a medium in the form of either waves or corpuscular emission.
The process by which electromagnetic energy moves through space as vibrations in electric and magnetic fields. This term also refers to radiant energy and other forms of electromagnetic radiation, such as gamma rays and X-rays.
1. The process by which electromagnetic radiation is propagated through free space. The propagation takes place at the speed of light (3.00 x 108 m sâˆ’1 in vacuum) by way of joint ( orthogonal) oscillations in the electric and magnetic fields. This process is to be distinguished from other forms of energy transfer such as conduction and convection. 2. Propagation of energy by any physical quantity governed by a wave equation See alpha ray, beta ray.
The transfer of heat through matter or space by means of electromagnetic waves.
The process by which energy is propagated through any medium by virtue of the wave motion of that medium, as in propagation of heat waves through the atmosphere.
Process by which energy travels across space.
All warm bodies emit light (electromagnetic radiation - mostly infrared). When this radiation is absorbed or emitted by a body, heat is transferred and termed "heat transfer by radiation". Such heat transfer requires a line of sight (view factor) and is proportional to the fourth power of the absolute temperature difference between bodies and the emissivity of the bodies.
The emission and transmission of energy through space or through a material medium.
Electromagnetic waves or particles which travel through space carrying energy.
Energy that is sent out as waves or particles.
(1) emission or transfer of energy in the form of electromagnetic waves (2) the process by which electromagnetic radiation is propagated through free space by virtue of joint undulatory variations in the electric and magnetic fields in space; this concept is to be distinguished from conduction and convection.
Energy transmitted in the form of electromagnetic waves or subatomic particles.
The process by which energy is propagated through any medium by virtue of the wave motion of that medium. Electromagnetic radiation, which emits heat and light, is one form. Sound waves are another.
Radiation in physics is the process of emitting energy in the form of waves or particles. Various types of radiation may be distinguished, depending on the properties of the emitted energy/matter, the type of the emission source, properties and purposes of the emission, etc. When used by the general public, the word "radiation" commonly refers to non-ionizing radiation.