A laser produces a 7.50-mW beam of light, consisting of photons with a wavelength of 632.8 nm.
Question:
(a) How many photons are emitted by the laser each second?
(b) The laser beam strikes a mirror at normal incidence and is reflected. What is the change in momentum of each reflected photon? Give the magnitude only.
(c) What force does the laser beam exert on the mirror?
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As each photon in a laser beam is reflected by a mirror its momentum is reversed resulting in an imp...View the full answer
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