a unit of energy of radiation equal to h where h is Planck's constant ( 6.6261 x 10-34 J sec) and is the frequency of the radiation equal to the speed of light ( 2.9979 x 108 m/s) divided by the wavelength of the light
The indivisible unit, or quantum, of electro-magnetic radiation. The energy of the photons determines the nature of the radiation, from radio waves at the lowest energy levels, up through infra-red, visible, and ultra-violet light, to X-or gamma-rays, which have energy high enough to ionize atoms.
In quantum theory, the elemental unit of light, having both wave and particle behavior. It has motion, but no mass or charge. The photon energy (E) is proportional to the EM wave frequency (v) by the relationship: E=hv; where h is Planck's constant (6.63 x10-34 Joule-sec).
a unit of energy in a radiant state, which means that it exudes energy in the form of heat, which means it is attempting to disperse a portion of it's energy, which is a description of a particle in flux
discrete "packet" of pure electromagnetic energy. Photons have no mass and travel at the speed of light. The term "photon" was developed to describe energy when it acts like a particle (causing interactions at the molecular or atomic level), rather than a wave. Gamma rays and x-rays are photons.
All matter absorbs and emits electromagnetic radiation in discrete small quantities called photons. The energy of a photon (E) varies withthe frequency of the radiation according to:- where is a constant known as Planck's constant.
Smallest unit of electromagnetic radiation and thus also of light. In his 1905 publication on the photoelectric effect, Einstein introduced light as consisting of light quanta with some properties of particles. There was long resistance against the idea of light particles, mainly by the Danish physicist Niels Bohr. When experiments showed that light can be scattered by electrons, Einstein's hypothesis was considered to be proven right.
A bit of light---the quantum of electromagnetic energy--- a discrete particle having zero mass, no electric charge, and an indefinitely long lifetime. Polarization: A state in which light-wave vibrations line up in the same direction, like the wave created on a jump rope when jerked sideways or the glare off a lake blocked by polarizing sunglasses.
A packet of energy that can be thought of as a particle of light travelling at the speed of light. A photon of energy E is equivalent to an electromagnetic wave of wavelength Î»=hc/E, where h is Planck's constant and c is the speed of light in a vacuum. A to F | G to L | M to R | S to Z
A 'packet' of energy with no mass, which travels at the speed of light. Photons range from very low energies [such as infrared and visible light], moderate energies [ultraviolet and X-rays] to high energy [gamma].
Photon is an elementary particle of zero mass and spin 1/2. The photon is involved in electromagnetic interactions and is the quantum of electromagnetic radiation. The photon may also be regarded as a unit of energy equal to E = hâˆ™Î½ where is Planck constant and Î½ is the frequency of the radiation.
The smallest 'unit' of electromagnetic radiation. The energy of a photon is a function of its frequency and can be calculated from the expression E = hf where h is Planck's Constant (= 6.626 x 10-34 Js)
colloquially, a "particle of light." Although light spreads as an electromagnetic wave, it can be created or absorbed only in discrete amounts of energy, known as photons. The energy of photons increases, the shorter the wavelength--smallest for radio waves, larger for visible light, largest for x-rays and gamma rays.
A discreet amount of electromÃ¡gnetica energy. The short photons of the wavelength (of high frequency) take more energy than of length photons of the wavelength (low frequency). See The ElectromÃ¡gnetica Radiation.
The actual (physical) particle unit of light, as the electron is of electric charge and the atom and molecule are of matter. Light has both wave properties and particle properties. Violet light has relatively short wavelength and higher energy in its photons; red light has longer wavelength, lower-energy photons. The wavelength and/or energy spectrum of the sun extends in both directions beyond the visible range of light, of course, and the silicon module solar cell can capture some energy in both of these invisible zones. Photons not captured by the cell are either reflected or converted to heat in the solar array.
The basic unit (quantum) of electromagnetic radiation. Light waves, gamma rays, x-rays, and so on consist of photons. Photons are discrete concentrations of energy that seem to have no rest mass and move at the speed of light. Their nature can be described only in mathematical terms. Photons are emitted when electrons move from one energy state to another, as in an excited atom. SEE ALSO gamma decay; radiation.
The photon is a light quantum, the smallest energy unit of light. The term was coined by Albert Einstein. The elementary particle photon moves at the speed of light, and when it encounters a solar cell, its energy is directly converted to electricity. Hence the term â€˜photovoltaicsâ€™ .
The massless particle that, according to the quantum theory of radiation, carries the smallest discrete amount of electromagnetic energy Î½, where is Planck's constant and Î½ is the frequency of the associated electromagnetic wave. Although the photon has no mass it does have ( linear) momentum , where is the free- space speed of light, and intrinsic angular momentum (spin) /2Ï€, as evidenced by radiation pressure and radiation torque.
Photon was a live action series based on the infrared tag game popular in the 1980s. The series took place on Earth and in space on various worlds and involved a young human teen named Christopher Jarvis who is a champion player of Photon. He receives a mysterious message one day while playing and is transported to the ship of Mother One, the leader of the Federation of Light a galactic amalgam of beings dedicated to playing Photon and the power of good over evil.