ls it always true that for two sources of equal intensity, the nu… - Vidyadip

Question

ls it always true that for two sources of equal intensity, the number of photons emitted in a given time are equal?

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Answer

Let the source's area be A, and intensity of the source be I. The energy of each emitted photonis E. Then, the number of photons emitted in a given time will be $\text{n}=\frac{\text{I}}{\text{AE}}.$
If the areas of the sources and the wavelengths of light emitted by the two sources are different, then the number of photons emitted will be different.

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