p39_045 - 45. The initial wavelength of the photon is...

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45. The initial wavelength of the photon is (using the result of problem 3) λ = hc E = 1240 eV · nm 17500 eV =0 . 07086 nm or 70 . 86 pm. The maximum Compton shift occurs for φ =180 , in which case Eq. 39-11 (applied to an electron) yields λ = µ hc m e c 2 (1 cos 180 )= µ 1240 eV · nm 511 × 10 3 eV (1 ( 1)) = 0 . 00485 nm where Table 38-3 is used. Therefore, the new photon wavelength is
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