Define how many photons will travel through the pinhole

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Reference no: EM13179328

An argon ion laser puts out 5.0 W of continuous power at a wavelength of 532 nm. The diameter of the laser beam is 5.5 mm. If the laser is pointed toward a pinhole with a diameter of 1.2 mm, how many photons will travel through the pinhole per second? Assume the light intensity is equally distributed throughout the entire cross-sectional area of the beam (1W= 1 J/s)

Reference no: EM13179328

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