General Physics, 2nd Edition
General Physics, 2nd Edition
2nd Edition
ISBN: 9780471522782
Author: Morton M. Sternheim
Publisher: WILEY
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Chapter 26, Problem 7E
To determine

The distance from the lamp when the number of photons per square meter per second is equal to 1015photons/m2s.

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A helium‑neon laser produces light of wavelength 632.8 nm. The laser beam carries a power of 0.75 mW and strikes a target perpendicular to the beam. How many photons per second, n, strike the target? n = ? photons/s At what rate R does the laser beam deliver linear momentum to the target if the photons are all absorbed by the target? R = ? kg·m/s2
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