Physics, 14.09.2019 06:10 rosaura15

How many photons are emitted per second by a he−ne laser that emits 1.5 mw of power at a wavelength λ=632.8nm. what is the frequency of the electromagnetic waves emitted by a he−ne laser?

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How many photons are emitted per second by a he−ne laser that emits 1.5 mw of power at a wavelength...