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Question
If NRed and NBlue are the numbers of photons emitted by the respective sources of equal power and equal dimensions in unit time, then ______.
Options
NRed < NBlue
NRed = NBlue
NRed > NBlue
NRed ≈ NBlue
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Solution
If NRed and NBlue are the numbers of photons emitted by the respective sources of equal power and equal dimensions in unit time, then NRed > NBlue.
Explanation:
Photons emitted in a unit of time with the same power and dimensions will have the same energy. Because blue light has more frequency than red light, its energy is greater than red light's. Therefore, the required number of blue photons to emit the same energy is less than the required number of red photons.
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