Practicing Success
Practicing Success
CUET Preparation Today
A radio transmitter radiated 1 kW power at a wavelength 198.6 m. How many photons does it emit per second? |
$10^{10}$ $10^{20}$ $10^{30}$ $10^{40}$ |
$10^{30}$ |
Here, number of photons emitted per second, $n=\frac{P}{E}=\frac{P}{hv}=\frac{Pλ}{hc}$ $(∵ v=\frac{c}{λ})$ $=\frac{1000×198.6}{6.6×10^{-34}×3×10^8}=10^{30}$ |
