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CBSE Class 12-science Answered

What are the factors on which the intensity of stimulated radiation depends?
Asked by | 21 Mar, 2009, 11:12: AM
answered-by-expert Expert Answer

If the photons or waves are out of phase or inchoherent, the resultant intensity would be the sum of the individual intensities and this is proportional to n x a2(Recall that intensity is proportional to the square of the amplitude). Here n is the number of waves and a is the amplitude of each wave.

Since the waves are in phase, however their total amplitude is na. Hence the resultant intensity is proportional to (na)2. The intensity is greater by factor n than that obtained from incoherent waves, such as those from an ordinary lamp filament.

Answered by | 04 Apr, 2009, 03:55: PM

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