energy=number(plancks constant)*frequency
now you have an issue with the problem. Power emitted is given, so you cannot find the number of photons,so number is actually going to be number of photons per second
power=photons/second* plancksconst*freq
An FM radio station of frequency 107.7MHz puts out a signal of 50,000W. How many photons/s are emitted?
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