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AP Physics 2
15.6 Compton Scattering
AdvancedMCQMathematical14.3k
A two-panel schematic diagram illustrating a 1D Compton scattering collision. Top panel labeled 'Before Collision' shows a stationary electron represented by a shaded circle and an incoming photon represented by a horizontal sinusoidal line with an arrow pointing right labeled \(\lambda_0\). Bottom panel labeled 'After Collision' shows the electron moving right with a straight arrow labeled \(p_e\) and the scattered photon represented by a horizontal sinusoidal line with an arrow pointing left labeled \(\lambda\). No other labels, lines, text, or axes appear.
Schematic representation of the head-on photon-electron collision.
A photon of initial wavelength \(\lambda_0\) travels in the positive \(x\)-direction and undergoes a head-on collision with an electron that is initially at rest. As a result of the Compton scattering process, the photon is backscattered directly along the negative \(x\)-direction with a longer wavelength \(\lambda\). Which of the following expressions correctly represents the magnitude of the recoil momentum \(p_e\) of the electron immediately after the collision?

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