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An incandescent lamp is operating at a temperature of 1000K at an operating frequency of 5.2×1014 Hz. Calculate the ratio of stimulated emission rate to spontaneous emission rate.

An incandescent lamp is operating at a temperature of 1000K at an operating frequency of 5.2×1014 Hz. Calculate the ratio of stimulated emission rate to spontaneous emission rate. Correct Answer 1.47×10-11

The ratio of the stimulated emission rate to the spontaneous emission rate is given by- Stimulated emission rate/ Spontaneous emission rate = 1/exp (hf/KT)-1.

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