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A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
Mar 12, 2024 · In the classical description, light is a wave. When a wave passes into and back out of a medium, its frequency is unchanged, and although its wavelength is altered while it is in the medium, it returns to its original value when the wave reemerges.
Jan 19, 2023 · Thermal light is due to the random motion of charges and the equipartition of energy. The light given off by fireworks is different colors because oxidizing pure substances gives off light whose frequency is determined by the energy available to electrons in the metal.
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [ 1 ] . Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz.
Mar 10, 2022 · Photons are fundamental subatomic particles that carry the electromagnetic force — or, in simpler terms, they are light particles (and so much more). The photon is also the "quantum," or...
Is light a wave or a particle? How is it created? And why can’t humans see the whole spectrum of light? All your questions answered.
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Atoms and ions in the Earth's upper atmosphere absorb gamma-rays, x-rays, and ultraviolet light; the atmosphere is opaque to these three forms of radiation. (The UV which is responsible for sunburn and skin cancer is "very-violet" visible light by our astronomical definition.)
