2. Pause lasers are useful sources of nearly monochromatic radiation. Lasers that emit photons in a
pulse of 3.5 ns duration with a total energy in the pulse of 0.158 J at 835 nm. (4 points)
申論題內容
(a) What is the averages power (energy per unit time) in units of watts (a W = 1 J/s) associated with
such a pulse?
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