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AP Physics 2
15.6 Compton Scattering
AdvancedMCQMathematicalConceptual23.2k
A 2D schematic on a plain background showing a Compton collision. At the center sits a small filled circle labeled e^-. From the left, an incoming wavy arrow labeled \lambda points horizontally toward the electron. A horizontal dashed reference line extends to the right from the electron. A second wavy arrow representing the scattered photon extends from the electron upward and to the right at an angle labeled \theta relative to the horizontal dashed line. A straight solid arrow representing the recoiling electron extends from the electron downward and to the right. No other labels, lines, text, or axes appear.
Schematic representation of Compton scattering of a photon by a stationary electron.
In three separate Compton scattering trials, an incident photon collides with an electron that is initially stationary and free to move.

Case 1: A photon of wavelength \(\lambda_0\) scatters through an angle of \(\theta = 90^\circ\).

Case 2: A photon of wavelength \(\lambda_0\) scatters through an angle of \(\theta = 180^\circ\).

Case 3: A photon of wavelength \(2\lambda_0\) scatters through an angle of \(\theta = 180^\circ\).

Which of the following correctly ranks the kinetic energy \(K_e\) gained by the electron in each case?

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