Question

A transmitter of 10kw is emitting radio waves of wavelength 500nm . How many photons per second are emitted by the transmitter​

Answer 1

Answer:

Energy emitted by the transmitter per sec,Et = 10kW

Energy of the wave, Ew = hc/λ

where λ= 500m

Plugging the values gives Ew = 3.96 * 10-28

No of photons emitted per sec, n = Et / Ew = 10000 / 3.96 * 10-28 = 2.5 * 1031