A Certain Photon,after Being Scattered from a Free Electron That

A certain photon,after being scattered from a free electron that was at rest,moves at an angle of 120° with respect to the incident direction.If the wavelength of the incident photon is 0.6110 nm,what is the kinetic energy of the recoiling electron? (m_electron = 9.11 × 10^-31 kg,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

A) 1.5 × 10^-18 J
B) 1.9 × 10^-18 J
C) 3.1 × 10^-18 J
D) 4.3 × 10^-18 J
E) 5.2 × 10^-18 J

Correct Answer:

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