28_InstSolManual_PDF_Part3

28_InstSolManual_PDF_Part3 - s 21 3.00 3 10 8 m s 2 250 3...

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Reflect: When the wavelength decreases the energy of the photons increases and the photoelectrons have a larger minimum kinetic energy. 28.12. Set Up: where is the stopping potential. where is the threshold wavelength. Solve: (a) Then (b) 28.13. Set Up: where is the stopping potential. The stopping potential in volts equals in electron volts. Solve: (a) so The stopping potential is 2.7 volts. (b) (c) 28.14. Set Up: The stopping potential is related to the frequency of the light by The slope of versus is The value of when is related to by Solve: (a) The data points are: and The graph of versus is given in Figure 28.14. Figure 28.14 1.0 2.0 3.0 4.0 5.0 f (10 15 Hz) 5.0 10.0 15.0 V 0 (volts) f V 0 1 4.26 3 10 15 Hz, 13.5 V 2 . 1 3.42 3 10 15 Hz, 10.0 V 2 1 2.21 3 10 15 Hz, 5.00 V 2 , 1 f , V 0 2 f5 hf th . f V 0 5 0 f f th h / e . f V 0 f 5 c l . V 0 5 h e f 2 f e . V 0 v max 5 Å 2 1 2.7 eV 21 1.60 3 10 2 19 J / eV 2 9.11 3 10 2 31 kg 5 9.7 3 10 5 m / s 1 2 m v max 2 5 2.7 eV eV 0 5 hf 2f5 1 4.136 3 10 2 15 eV
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Unformatted text preview: # s 21 3.00 3 10 8 m / s 2 250 3 10 2 9 m 2 2.3 eV 5 4.96 eV 2 2.3 eV 5 2.7 eV. eV 5 1 2 m v max 2 1 2 m v max 2 5 hf 2 f . eV V eV 5 1 2 m v max 2 , f 5 hc l th 5 4.71 eV l th 5 hc 4.71 eV 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 4.71 eV 5 263 nm. hc l th 5 hc l 2 eV 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 254 3 10 2 9 m 2 0.181 eV 5 4.89 eV 2 0.181 eV 5 4.71 eV. eV 5 hc l 2 hc l th . l th hc l th 5 f , c 5 f l . eV 5 hc l 2 f . eV 5 0.181 eV. V 1 2 m v max 2 5 eV , 1 2 m v max 2 5 4.14 eV 2 2.00 eV 5 2.14 eV. 1 2 m v max 2 5 hf 2 f 5 hc l 2 f 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 300.0 3 10 2 9 m 2 2.00 eV. Photons, Electrons, and Atoms 28-3...
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This note was uploaded on 03/06/2009 for the course PHYS 114 taught by Professor Shoberg during the Spring '07 term at Pittsburg State Uiversity.

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