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Back to 29.4 Photon Momentum

29.4 Exercise 1

Avg difficulty 2.5

The mass of a proton is 1.67 × 10–27 kg. If a proton has the same momentum as a photon with a wavelength of 325 nm, what is its speed?

  1. 2.73 × 10–3 m/s
  2. 0.819 m/s
  3. 1.22 m/s
  4. 2.71 × 104 m/s

OpenStax College Physics 2e, 29.4 Photon Momentum, exercise 1

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.