The radio station emits 10kW power of 90.8 MHz. Find the number of photons emitted per second.
Correct answer: B. 1.6 x 10^29
- A. 1.6 x 10^28
- B. 1.6 x 10^29
- C. 1.6 x 10 30
- D. 1.6 x 10 32
Explanation
This is the correct option.E = hf = 6x10^-26Power = 10kWTotal photons in one sec N = P/E = (10 x10^3)/(6x10^-26 ) = 1.6 x 10^29
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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