Q. 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. (Solved)
1. 3×10-13
2. 1.47×10-11
3. 2×10-12
4. 1.5×10-13
- b. 1.47×10-11