Question: (a) How many photons are emitted per second by a He-Ne laser that emits 2.2 mW of power at a wavelength ( = 632.8 nm?

(a) How many photons are emitted per second by a He-Ne laser that emits 2.2 mW of power at a wavelength ( = 632.8 nm?
(b) What is the frequency of the electromagnetic waves emitted by a He-Ne laser?

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