Find the pressure exerted on a surface by the photon beam of Problem 42.7 if the cross-sectional
Question:
Find the pressure exerted on a surface by the photon beam of Problem 42.7 if the cross-sectional area of the beam is 3.0 mm2. Assume perfect reflection at normal incidence.
Problem 42.7
A beam (λ = 633 nm) from a typical laser designed for student use has an intensity of 3.0 mW. How many photons pass a given point in the beam each second?
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Each photon has a momentum 663 1034 JS 633 10 m h X 105x102kg ms When a photon reflec...View the full answer
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