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3063_ProblemSet5

# 3063_ProblemSet5 - PHY3063 Spring 2007 Problem Set 5 PHY...

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PHY3063 Spring 2007 Problem Set 5 Department of Physics Page 1 of 2 PHY 3063 Problem Set #5 Due Thursday February 22 (in class) (Total Points = 60, Late homework = 50%) Reading: Finish reading Tipler & Llewellyn Chapter 3 and start reading Chapter 4. Problem 1 (5 points): A metal has a work function of 3.0 electron volts. What is the maximum kinetic energy ( in eV ) of a photoelectron emitted by the surface of the metal if light with a wavelength of 500 nm falls on the surface? Problem 2 (15 points): θ = 90 o Photon: E 1 , p 1 Photon: E 0 , p 0 Before Electron at Rest Electron: E 2 , p 2 After Ψ A photon with energy E 0 strikes an electron at rest in a Compton scattering and exits at an angle θ = 90 o relative to its incoming direction, where m e c 2 = 0.511 MeV . Part A (5 points): If E 0 = 2m e c 2 , what is the energy of the outgoing photon ( in MeV )? Part B (5 points): If E 0 = 2m e c 2 , what is the recoil kinetic energy of the electron ( in MeV )? Part C (5 points): If E 0 = 2m e c 2 , what is the recoil angle Ψ of the electron ( in degrees )?

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