Question Detail
Question
An FM radio transmitter has a power output of 100 kW and operates at a frequency of 94 MHz. How many photons per second does the transmitter emit?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Power P = N × E, where N is the number of photons per second and E = hf. N = P/(hf) = (100 × 10³) / (6.626e-34 × 94e6) = 1e5 / 6.228e-26 = 1.605 × 10³⁰ /s.
Hint
N = P/(hf).