A term that refers to the link between electricity and magnetism first described by James Clerk Maxwell in 1865. Using mathematics to explain the link Maxwell showed that when an electric current moves backward and forward, it creates electromagnetic waves that radiates outward at the speed of light. From this discovery Maxwell concluded that light itself is a form of electromagnetic wave. The various types of electromagnetic radiation are distinguished by their wavelengths. They include: radio, television, radar, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays, and cosmic rays. With the exception of visible light, all forms of electromagnetic radiation are invisible to humans.
The combined effect of many photons traveling through space. See also: speed of light, Advanced Topics
Electromagnetic radiation is energy, carried by electric and magnetic fields, that travels through space at about 300,000 kilometres per second – the speed of light. The energy travels in the form of a wave. The distance between two adjacent wave crests is called a wavelength – the shorter the wavelength, the more energetic the radiation. Also, the shorter the wavelength, the greater the frequency of the radiation. Other than wavelength, frequency and energy there is no difference between a radio wave, an X-ray and the colour green. They all possess the same physical nature.
a form of energy that has wave characteristics and that propagates through a vacuum at the speed of 3.0 x 1010 cm/s
The emission and propagation of electromagnetic energy from a source including radio waves, heat rays, light, and X-rays.
A stream of particles or electromagnetic waves emitted from certain electrical equipment. The long-term effect of these emissions on humans is a matter of speculation at this time.
Energy emitted by a body and travelling through space in the form of electromagnetic waves. When electromagnetic radiation is absorbed by an object, the energy it contains is turned into a different form of energy such as heat or chemical energy.
Energy emitted as result of changes in atomic and molecular energy states and propagated through space at the speed of light.
Another term for light, electromagnetic radiation transfers energy and information from one place to another, even through the vacuum of empty space.
Any of a number of types of energy (i.e. radio waves, micro-waves, ultraviolet rays, infrared or heat rays, light, X-rays, and gamma rays) that travel at the speed of light.
Energy transfer in the form of electromagnetic waves or particles that propagate through space at the speed of light. [NOAA
Energy waves produced by the motion of an electric charge.
A wave with both an electric and a magnetic component, at right angles to each other. The electric field will interact with any charged particles, the magnetic field will only interact with charged particles that are motion.
Energy that travels through space is electromagnetic radiation. Electromagnetic radiation exhibits both wave and particulate properties (often called the dual nature of light). All electromagnetic radiation consists of oscillating electric and magnetic fields moving at the speed of light, but the wavelength of the radiation can vary widely. The wavelength is inversely proportional to its energy . Radio waves have long frequencies (and low energy) while x-rays have short frequencies (and high energy).
Forms of kinetic energy traveling as electromagnetic waves. Examples are radio waves, TV waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X rays, and gamma rays. Compare ionizing radiation, nonionizing radiation.
Energy involving electric fields and magnetic fields oscillating in phase at right angles to each other, propagated in a direction at right angles to both fields with a velocity in free space equal to (approximately 300,000 km/sec, or 186,000 miles/sec), a universal constant.
( Waves) Emission of energy in the form of electromagnetic waves. All objects above the temperature of absolute zero (-273.15° Celsius) radiate energy to their surrounding environment. The amount of electromagnetic radiation emitted by a body is proportionally related to its temperature.
Radiation consisting of particles or waves of energy associated with electric and magnetic fields, produced by the acceleration of an electric charge. Electromagnetic radiation is emitted by matter in discrete quantities of energy called photons. The type of electromagnetic radiation-whether it be infrared, radio or visible light-depends upon its frequency. The types of electromagnetic radiation of most concern in conservation are light and ultraviolet radiation. These form part of the electromagnetic spectrum. See also Electromagnetic spectrum; Frequency; Wavelength.
Another term for light. Light waves are actually fluctuations of electric and magnetic fields in space.
Electromagnetic radiation is simply energy which travels through space at about 300,000 kilometres per second – the speed of light. We can imagine radiation moving like a wave. The distance between two adjacent wave crests is called a wavelength. The shorter the wavelength, the more energetic the radiation is said to be. Also, the shorter the wavelength, the greater the frequency of the radiation. The highest frequencies in the spectrum of electromagnetic radiation are gamma-rays; the lowest frequencies are radio waves. For more information see Electromagnetic spectrum (NASA's Observatorium, USA) and Measuring the electromagnetic spectrum (High-Energy Astrophysics Learning Center, Goddard Space Flight Center, USA)
Refers to the entire energy spectrum that is available to the remote sensing process. EMR is not visible until it interacts with an object in such a way that it can be detected, either directly with our eyes, or indirectly using sensors.
a series of energy waves that travel in a vacuum at a speed of 2.9979 ×108 meter per second (m/s); includes radio waves, microwaves, visible light, infrared and ultraviolet radiation, x−rays, and gamma rays.
intimately coupled waves of electric and magnetic fields that propagate with the speed of light; examples are visible light and radio waves
another term for light which includes x-rays, gamma rays, ultraviolet, visible, infrared, microwave and radio waves.
Radiation of different wavelengths extending from radio waves to gamma rays and including visible light; often divided between natural (including ki or universal life energy) and artificial such as electrical or microwave.
All electromagnetic radiation is pure energy (zero mass) and part of the electromagnetic spectrum. Light energy is the most familiar part of this. All electromagnetic radiation travels at a speed of 3.0 x 108 m/s in a vacuum.
Energy that travels through space at the speed of light. The total range of electromagnetic wavelengths and frequencies is called the electromagnetic spectrum. Our eyes are sensitive to a sliver of the electromagnetic spectrum we call visible light, from red to blue. Beyond the blue end, as wavelength decreases and frequency increases, lie ultraviolet light, X-rays, and gamma-rays. In the other direction past red, as wavelength increases and frequency decreases, lies infrared, microwave, and radio regions of the electromagnetic spectrum. Radio waves are the longest, extending on the order of meters, while X-rays and gamma-rays are the shortest, on the order of atomic size. Light wavelengths are measured in microns, millionths of meters. For all forms of electromagnetic radiation, the speed of light must remain constant, regardless of wavelength or frequency. See also: spectrum
Radiation (such as radiowaves, microwaves, infrared rays, light, ultraviolet rays, x-rays, or gamma-rays) that contains both electric and magnetic components and travels at the speed of light.
The energy emitted by an electrical or magnetic source, and which obeys Maxwell equations.
Electromagnetic radiation is simply energy which travels through space at about 300,000 kilometres per second – the speed of light. We imagine radiation moving like a wave. The distance between two adjacent wave crests is called a wavelength. The shorter the wavelength, the more energetic the radiation is said to be. Also, the shorter the wavelength, the greater the frequency of the radiation. Other than wavelength, frequency and energy there is no difference between a radio wave, an X-ray and the colour green. They all possess the same physical nature. More information on the electromagnetic spectrum can be found at Electromagnetic spectrum (NASA), Electromagnetic spectrum (High-Energy Astrophysics Learning Center, Goddard Space Flight Center, US) and Light and colour: The nature of electromagnetic radiation (Florida State University, USA).
A general term to describe an interacting electric and magnetic wave that propagates through vacuum at the speed of light. It includes radio waves, infrared light, visible light, ultraviolet light, X rays and gamma rays.
a transmission medium that includes radio waves and light waves.
"Waves" of electrical and magnetic "disturbance," radiated as visible light, radio waves, or any other manifestation of the electromagnetic spectrum. The distance between successive crests of each wave is known as the wavelength, and varies considerably among electromagnetic forms. Radio waves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma rays all are electromagnetic radiations. In a vacuum, all electromagnetic radiation travels at the speed of light. The shorter the wavelength of a radiation, the more energetic it is.
Form of radiant energy that travels through space at 300,000 km/s and propagates by the interplay of oscillating electric and magnetic fields. This radiation has a wavelength and a frequency. (See also Light)
Electromagnetic radiation, or light, can be considered to be composed of particles (photons) or waves. Its properties depend on its wavelength: longer waves are less energetic than shorter waves - photons with long wavelength have less energy than short-wavelength photons. Electromagnetic radiation is usually described as bands of radiation of similar wavelength, e.g., infrared, radio waves, microwaves, gamma rays, X-rays... (These bands of radiation roughly correspond to the range of wavelengths which can be detected by different instruments.) Only a small fraction of the entire range of electromagnetic radiation can be detected by the human eye: visible light, or what in everyday-life is referred to simply as light. The human eye cannot detect wavelengths longer than those of the visible light, such as those of infrared light, microwaves (wavelengths of centimetres), or radio waves (wavelengths of metres). Wavelengths shorter than visible light cannot be seen either: ultraviolet light, X-rays, gamma rays (the most energetic).
These waves travel at the speed of light (approximately 3 x 108 m/s), and can be characterized by their wavelength.
The propagation of varying electric and magnetic fields through space at the velocity of light.
a special field where the magnetic field causes an electric field, which causes a magnetic field, which causes an electric field, which causes a magnetic field etc
radiation that is emitted in the form of photons, i.e. light.
Energy radiated in the form of a wave. It includes all kinds of radiation, including, in order of increasing energy, radio waves, microwaves, infrared radiation (heat), visible light, ultraviolet radiation, X-rays, and gamma radiation.
energy propagated in the form of an advancing interaction between electric and magnetic fields, always moving at the speed of light
Merely a term referring to all the forms of radiation, from radio wavelengths to gamma radiation.
radiant energy that exhibits wave-like behavior and travels through space at the speed of light in a vacuum.
Fluctuations of electric and magnetic fields that depending on their frequency take the form of visible light, radio waves, or X rays, among others. The photon is the carrier of electromagnetic radiation.
A kind of radiation including visible light, radio waves, gamma rays, X-rays, heat, microwaves, etc., in which electric and magnetic fields vary simultaneously.
The emanation of an electromagnetic field from a source through space.
includes visible light, heat, ultraviolet radiation, gamma rays, X rays etc. The term radiation is also used to refer to the emission of particles (such as alpha and beta particles) from a radioactive atom.
A collective term for radiation consisting of oscillating electric and magnetic fields. It includes from shortest to longest wavelengths (gamma rays, X-rays, ultraviolet, visible light, infrared, microwave, and radio waves).
the various forms of light; includes radio waves, infrared light, visible light, ultraviolet light, x rays, and gamma rays
a traveling wave motion resulting from changing electric or magnetic fields. Familiar electromagnetic radiations range from x-rays (and gamma rays) of short wavelength, through the ultraviolet, visible, and infrared regions, to radar and radio waves of relatively long wavelength. All electromagnetic radiations travel in a vacuum with the velocity of light (see photon).
energy from the sun that exhibits both electrical and magnetic properties.
Consists of massless packets of pure energy called photons produced by changes in the energy of charged particles, usually electrons. Photons travel through space at the speed of light. When the changes of energy are small, streams of photons can be described as waves of changing electric and magnetic fields, called electromagnetic waves. The most familiar type of electromagnetic radiation is visible light, but the full spectrum of electromagnetic radiation includes radio, microwave, infrared, ultraviolet, X rays and gamma rays. [More Info
A field varying in time and place, characterised by the intensity of electrical and magnetic fields, and which propagates from the source of radiation (see antenna).
Electromagnetic radiation is light, but it extends beyond the small proportion of the spectrum that our eyes can see. We can obtain images at other frequencies using cameras sensitive in those frequencies.
Energy transmitted in the form of combined electric and magnetic waves. Includes (in order of increasing frequency and energy, and decreasing wavelength): radio waves; microwaves; infrared light; visible light; ultraviolet (UV) radiation; x-rays; gamma rays. Visible light is the only form of electromagnetic radiation that we can see with our eyes.
The complete spread of waves, formed by traveling electric and magnetic fields. Called EMR, these waves span the range from radio to television, microwaves, heat (Infrared), visible light, ultraviolet, x-rays, gamma rays, and cosmic radiation.
Combination of electrical and magnetic vibrations called waves that constitute the electromagnetic spectrum. The human eye sees only a small range of electromagnetic waveforms, or wavelengths, from approximately 400 nm (violet) to 700 nm (red) in the area designated visible light.
Another term for light. Light waves created by fluctuations of electric and magnetic fields in space.
Energy propagated as time-varying electric and magnetic fields. These two fields are inextricably linked as a single entity since time-varying electric fields produce time-varying magnetic fields and vice versa. Light and radar are examples of electromagnetic radiation differing only in their wavelengths (or frequency). Electric and magnetic fields propagate through space at the speed of light.
Energy that flows through space and matter both in the form of magnetic and electric waves and in the form of a stream of invisible particles.
the energy produced by an oscillating electrical (and magnetic) field, transmitted by photons. See Electromagnetic Spectrum.
Energy propagated through space or through material media in the form of an advancing interaction between electric and magnetic fields.
Radiation consisting of waves propagated through the building up and breaking down of electric and magnetic fields; these include radio, infrared, light, ultra-violet, x rays' and gamma rays.
Radiation consisting of associated and interacting electric and magnetic waves that travel at the speed of light; in order of increasing energy these include radio waves, visible light, x rays, and gamma rays. All electromagnetic radiation can be transmitted through a vacuum.
Energy propagated as waves through space or through material media in accordance with basic wave theory.
a self-propagating electric and magnetic wave, such as radio, visible, ultraviolet, X- and gamma-radiation
1.The entire arrangement of visible and invisible light waves. 2. Electric and magnetic forces which vibrate at right angles to each other and can travel through space. These include light, radio waves, and infrared and ultraviolet radiation.
Term used to describe the entire range of light radiation from gamma rays to radio waves. We tend to think of optical radiation as light but the rainbow of colors that make up optical or visible light is just a tiny part of a much broader range of light energy.
The technical term for light, which consists of a propagating wave in the electric and magnetic fields that fill space. Includes, among other things, radio waves, infrared light, visible light and X-rays. In each case the radiation is characterized by a different wavelength. What instruments do astronomers use to find black holes
Electromagnetic radiation is energy in wave form.
Energy propagated at the speed of light by an electromagnetic field.
Changing electric and magnetic fields that travel through space and transfer energy from one place to another - light, radio waves and magnetism
Radiation consisting of electric and magnetic waves that travel at the speed of light. Examples: light, radio waves, gamma rays, x-rays.
Energy that is propagated by means of electric and magnetic fields that oscillate in directions perpendicular to the direction of travel of the energy.
A traveling wave motion that results from changing electric and magnetic fields. Types of electromagnetic radiation range from those of short wavelength, like x rays and gamma rays, through the ultraviolet, visible, and infrared regions, to radar and radio waves of relatively long wavelengths.
Radiation that travels through vacuous space at the speed of light and propagates by the interplay of oscillating electric and magnetic fields. This radiation has a wavelength and a frequency and transports energy.
Energy travelling as waves in the form of changing electrical and magnetic fields. Waves
Energy that travels through space at the speed of light. The total range of electromagnetic wavelengths and frequencies is called the electromagnetic spectrum. Radio waves have the lowest energies and longest wavelengths, extending on the order of meters, of all types of electromagnetic radiation. X-rays and gamma-rays have the highest energies and shortest wavelengths, about the size of atoms. Wavelengths of light are measured in microns, millionths of meters. For all forms of electromagnetic radiation, the speed of light must remain constant, regardless of wavelength or frequency. See also light
radiation which is emitted as an electromagnetic wave. Examples include light, heat, radio waves, x-rays and gamma rays.
EMR --- Can be defined as waves of emitted energy charcterized by the coexistence of electric and magnetic fields being propagated through air at approximately 186,000 miles per second. The visible light region is a very, very miniscule portion of the entire EM spectrum.
This is a spectrum of radiation that includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, gamma rays, and cosmic rays. All of these waves travel at the speed of light, and they exhibit some properties of waves and some properties of particles. The different types of electromagnetic radiation vary in their wavelength and their energies.
a self-propagating electric and magnetic wave, such as light, radio, ultraviolet, or infrared radiation; all types travel at the same speed and can be differentiated by wavelength or frequency.
a form of energy made of oscillating electric and magnetic fields. It is a fancy word for ``light'' and it includes (in order of increasing energy) radio, infrared, visible light (optical), ultraviolet, X-rays, and gamma rays.
Radiation that can be considered as a wave of electric and magnetic energy travelling through a vacuum or a material. Examples are gamma rays, X-rays, ultraviolet radiation, light, infrared radiation and radiofrequency radiation.
The field effects given off by accelerating a charged particle in a magnetic field. Depending on field strength and speed of acceleration, many types of electromagnetic radiation are created.
The radiation of radio waves into space.
A series of waves that are propagated by simultaneous, periodic variations of electrical and magnetic fields. Examples of electromagnetic radiation include radio waves, light, X-rays, gamma rays and others.
Energy in a wave form that possesses both electrical and magnetic characteristics. EMR radiates in the form of a wave which can accelerate charged particles. Electromagnetic radiation can travel through a vacuum and its energy varies greatly; radio waves have the longest wavelengths and the lowest frequency and energy, while X-rays and gamma rays have the shortest wavelengths and highest frequencies and energies. (Basic Science/Radiography/radioactivedecay/twoforms_nucrad_popup.htm)(Course Material/Radiography/EquipmentMaterials/xraysources.htm)(Course Material/Radiography/Physics/nature.htm)
Energy transmitted with the velocity of light (290,800 km/s) in the form of gamma, X-ray, ultraviolet, visible, infrared, microwave, and radiowaves or portions thereof.
Changing electric and magnetic fields that travel through space and transfer energy from one place to the other; examples are light or radio waves.
A form of energy that propagates through space as vibrations of electric and magnetic fields; also called radiation or light. All electromagnetic radiation is a form of light.
A form of energy carried by waves.
Waves of electrical and magnetic energy moving together through space. Also called electromagnetic energy.
n. The propagation of a magnetic field through space. Radio waves, light, and X rays are examples of electromagnetic radiation, all traveling at the speed of light.
Also called radiation, it is waves of energy propagated though space or through a material media.
Electromagnetic radiation is generally described as a self-propagating wave in space with electric and magnetic components. These components oscillate at right angles to each other and to the direction of propagation, and are in phase with each other. Electromagnetic radiation is classified into types according to the frequency of the wave: these types include, in order of increasing frequency, radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.