Astronomy   View all facts   Glossary   Help

physical phenomena > event > atomic process > bound-bound transition

bound-bound transition
subject			fact

bound-bound transition	has definition Transition between energy levels of an electron bound to a nucleus (the electron is bound both before and after the transition).
	is a kind of atomic process
atomic process	has domain atomic physics
event	has duration
	has synonym world point
	has time of occurrence

Kinds of bound-bound transition :

• fluorescence (1 kind, 6 facts) - The absorption of a photon of one wavelength and reemission of one or more photons at longer wavelengths, especially the transformation of ultraviolet radiation into visible light., 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.
• spontaneous emission (3 facts) - Radiation emitted by an isolated body.
• stimulated emission (4 facts) (induced 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.