Q. A ratio transmitter operates at a frequency 880 kHz and a power of 10 kW. The number of photons emitted per second is
A) $1.72 \times 10^{31}$
B) $1.327 \times 10^{25}$
C) $1.327 \times 10^{37}$
D) $1.327 \times 10^{45}$
Explanation
(a) Number of photons emitted per sec,
$n = \frac{Power}{Energy\ of\ photon} = \frac{P}{hv}$
$= \frac{10000}{6.6 \times 10^{- 34} \times 880 \times 10^{3}} = 1.72 \times 10^{31}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.