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is a kind of |
is an instance of |
fluorescence | The emission of light at one wavelength, the green say, following absorption of light with a much shorter wavelength such as the ultraviolet. The UV photon parts with its energy by ejecting the electron into a high-energy level from which it cascades back down, releasing photons of lower energy and therefore longer wavelengths. A material which has this property is called a phosphor. | world point | emission | |
spontaneous emission | Radiation emitted by an isolated body. | world point | | emission |
stimulated emission | Radiation emitted by a body, such as an atom, when it is bombarded by radiation. The stimulated radiation has the same wavelength and direction as the bombarding radiation. | induced emission | | emission |