Question

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. $0.075\times {10}^{-34}$

Answer 1

The correct option is A

$1.72\times {10}^{31}$

Number of photons emitted per second
$n=\frac{p}{hv}=\frac{10\times {10}^3}{6.6\times {10}^{-34}\times 880\times {10}^3}=1.72\times {10}^{31}$