12.3 CHAPTER 12. WAVE NATURE OF MATTER
Chapter 12 — Summary
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- The momentum of a photon can be related tothe energy of the photon, p =Ec.
- Combined with E =hcλ, a relationship betweenmomentum and wavelength is
derived. - De Broglie postulatedthat this relationship holds for all particles andany object
has a de Broglie wavelength.
Chapter 12 End of Chapter Exercises
- If the following particles have the same velocity, which has the short-
est wavelength: electron, hydrogen atom, lead atom? - A bullet weighing 30g is fired at a velocity of 500 m· s−^1. What is its
wavelength? - Calculate the wavelength of an electron which has a kinetic energy of
- 602 × 10 −^19 J.
- If the wavelength of an electron is 10 −^9 m what is its velocity?
- Considering how onecalculates wavelength using slits, try to explain
why we would not beable to physically observe diffraction of the
cricket ball in the first worked example.
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