ch38-p019 - 19. (a) We use the photoelectric effect...

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(b) The first equation displayed above yields Φ= = −= hc K m λ 1 1 1240 491 0 710 182 eV nm nm eV eV. .. 19. (a) We use the photoelectric effect equation (Eq. 38-5) in the form hc / λ = Φ + K m . The work function depends only on the material and the condition of the surface, and not on the wavelength of the incident light. Let λ 1 be the first wavelength described and λ 2 be the second. Let K m 1 = 0.710 eV be the maximum kinetic energy of electrons ejected by light with the first wavelength, and K m 2 = 1.43 eV be the maximum kinetic energy of
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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