Physics · Atomic and Molecular Physics
An X-ray photon of initial energy 20 keV undergoes inelastic Compton scattering from a carbon target. If the photons are scattered at an angle of 90° with respect to the incident beam, what is the approximate energy of the scattered photon in keV? (Planck constant h = 6.6 × 10-34 Js, speed of light c = 3 × 108 m/s, electron mass me = 9.1 × 10-31 kg, elementary charge e = 1.6 × 10-19 C)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 120.78 keV
- 220.00 keV
- 318.52 keV
- 419.24 keV✓
Correct answer
19.24 keV
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