Q. A radio transmitter operates at a frequency of $880\ kHz$ and a power of $10\ kW.$ The number of photons emitted per second are
A) $1.72 \times 10^{31}$
B) $1327 \times 10^{34}$
C) $13.27 \times 10^{34}$
D) $0.075 \times 10^{- 34}$
Explanation
(a) Number of photons emitted per second
$n = \frac{p}{hv} = \frac{10 \times 10^{3}}{6.6 \times 10^{- 34} \times 880 \times 10^{3}} = 1.72 \times 10^{31}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.