An incandescent lamp is operating at a temperature of 1000K at an oper – McqOptions

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1.	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.
A.	3 10<sup>-13</sup>
B.	1.47 10<sup>-11</sup>
C.	2 10<sup>-12</sup>
D.	1.5 10<sup>-13</sup>
Answer» C. 2 10<sup>-12</sup>

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