College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 27 - Quantum Physics - Learning Path Questions and Exercises - Multiple Choice Questions - Page 934: 10


(a) $20^{0}$

Work Step by Step

in Compton effect least Recoil energy received by the least change in electron means least change in wavelength $\Delta\lambda$ $\Delta\lambda = \lambda-\lambda_{0} = \lambda_{c}(1-cos\theta)$ where $\lambda_{c}$ is compton wavelength and $\theta$ is scattering angle . investigating with given values of $\theta$, $\Delta\lambda$ is least with $\theta$ = $20^{0}$ , { $\theta$ = $20^{0}$ , $\Delta\lambda= \lambda_{c}(1-cos 20^{0})$=$\lambda_{c}(1-0.93)$= 0.07$\lambda_{c}$ $\theta$ = $45^{0}$ , $\Delta\lambda= \lambda_{c}(1-cos 45^{0})$=$\lambda_{c}(1-0.707)$= 0.293$\lambda_{c}$ $\theta$ = $60^{0}$ , $\Delta\lambda= \lambda_{c}(1-cos 60^{0})$=$\lambda_{c}(1-0.5)$= 0.5$\lambda_{c}$ $\theta$ = $80^{0}$ , $\Delta\lambda= \lambda_{c}(1-cos 80^{0})$=$\lambda_{c}(1-0.173)$= 0.827$\lambda_{c}$ }
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