X-Rays of Wavelength 0

X-rays of wavelength 0.20 nm are scattered by a free electron.The change in the wavelength of the x-rays is observed to be 2.0 × 10^-12 m at a certain scattering angle measured relative to the incoming x-ray direction.What is the scattering angle of the x-rays? (m_electron = 9.11 × 10^-31 kg,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

A) 20°
B) 40°
C) 60°
D) 80°

Correct Answer:

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