A 337 nm nitrogen laser puts out 5 00 W of power with a beam 4 80 mm in diameter The beam is pointed directly at a pinhole which

Question

A 337 nm nitrogen laser puts out 5 00 W of power with a beam 4 80 mm in diameter The beam is pointed directly at a pinhole which has a diameter of 1 20 mm How many photons of light will travel through the pinhole per second Assume that the intensity of the light is equally distributed across the whole area of the beam number of photons per second photons s

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