Question
(a) How many photons are emitted per second by a He-Ne laser that emits $1.0 \mathrm{mW}$ of power at a wavelength $\lambda=632.8 \mathrm{nm} ?$(b) What is the frequency of the electromagnetic waves emitted by a He-Ne laser?
Step 1
We know that 1 milliwatt is equal to $10^{-3}$ watts. So, the power of the laser in watts is $1.0 \times 10^{-3}$ W. Show more…
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