# ZQuiz 4 - Exam Version A h = 6.63 x 10-34 J sec c = 3 x 108 m/sec MULTIPLE CHOICE Choose the one alternative that best completes the statement or

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Exam Version A h = 6.63 x 10 -34 J sec c = 3 x 10 8 m/sec MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The work function of a particular substance is 2.54 x 10 -19 J. What is the photoelectric cutoff wavelength for this material? A) 916 nm B) 783 nm C) 509 nm D) 650 nm 2) What is the velocity of an electron (mass = 9.1 x 10 -31 kg) with a de Broglie wavelength of 4.03 m m? A) 181 m/s B) 226 m/s C) 155 m/s D) 132 m/s 3) An electron (mass = 9.1 x 10 -31 kg) is trapped somewhere in a molecule which is 7.69 nm long. Calculate the minimum kinetic energy of the electron. A) 280 m eV B) 160 m eV C) 200 meV D) 16 m eV 4) A doubly-ionized lithium atom 3Li ++ undergoes a state transition from n = 5 to n = 4. The wavelength of the photon which is emitted is closest to: A) 650 nm B) 750 nm C) 550 nm D) 450 nm E) 350 nm 5) A 35.0 pm photon undergoes multiple Compton scattering by stationary electrons until the final wavelength of the photon is 75.0 pm.

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## This note was uploaded on 12/13/2011 for the course PHYS 2C PHYS 2C taught by Professor Groisman during the Spring '11 term at UCSD.

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ZQuiz 4 - Exam Version A h = 6.63 x 10-34 J sec c = 3 x 108 m/sec MULTIPLE CHOICE Choose the one alternative that best completes the statement or

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