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Physics
Atomic and Condensed Matter
Light determination for emission spectrum
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[QUOTE="blue_leaf77, post: 5702797, member: 536596"] In addition to the frequency or color mentioned by the others, the coherency can also be one of the factors discriminating between the so-called spontaneous emission and stimulated emission. In the former, the emitted photons are incoherent whereas in the latter they are coherent which is why lasers work the way we know it today. When only two levels are involved in the transition, ideally the emitted light will have only one color. But due to the uncertainty in energy which arises the moment the atom interacts with EM radiation, the emitted light will have slightly broadened spectrum, i.e. it contains other colors with lower intensity than that which corresponds to the energy difference between the two levels. [/QUOTE]
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Atomic and Condensed Matter
Light determination for emission spectrum
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