A monochromatic source, emitting light of wave length, 600 nm, has a p

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A monochromatic source, emitting light of wave length, 600 nm, has a power output of 66W. Calculate the number of photons emitted by this source in 2 minutes.

A monochromatic source, emitting light of wave length, 600 nm, has a power
output of 66W. Calculate the number of photons emitted by this source in
2 minutes.

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