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Q: 11.4 (c) Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. How fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon?
Answers (1)
Mass of Hydrogen Atom (m)=1.6710-27 kg.
The speed at which hydrogen atom must travel to have momentum equal to that of the photons in the beam is v given by
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