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The impact of energy
from outside, but within the law of motion due to atomic transitions as a
result of spontaneous transitions. This release of energy in the form
of transition there are two kinds: one is to release energy into thermal
motion, called the non-radiative transitions; the other is a form of
light out of the energy of radiation, called the spontaneous emission
transition. Spontaneous emission out of the light frequency of γ, from
the place of transition between two energy levels determined by the
energy difference. Ordinary light sources such as incandescent,
fluorescent, high pressure mercury lamp, xenon lamps, etc. through the
spontaneous transition radiation light, this light non-coherent light. |