28_InstSolManual_PDF_Part9

28_InstSolManual_PDF_Part9 - Photons Electrons and Atoms...

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28.34. Set Up: where is the wavelength of the x ray and V is the accelerating voltage. Solve: 28.35. Set Up: Energy conservation gives Solve: 28.36. Set Up: The shift in wavelength of the photon is where is the wavelength after the scattering and The energy of a photon of wavelength is Conservation of energy applies to the collision, so the energy lost by the photon equals the energy gained by the electron. Solve: (a) (b) (c) and so the photon loses 300 eV of energy. (d) Energy conservation says the electron gains 300 eV of energy. 28.37. Set Up: where The energy of a photon of wave- length is Conservation of energy applies to the collision, so the energy lost by the photon equals the energy gained by the electron. Solve: (a) (b) and The photon loses 4 eV and the electron gains 4 eV. Reflect: The maximum possible increase in wavelength is so the maximum is and this occurs at The increase in wavelength specified in the problem is less that the maximum allowed. Note that it is not correct to say that the energy gained by the photon is 28.38.
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