Question

Consider two different Compton scattering experiments, in which X-rays and γ rays of wavelength (λ) 1.024Å and 0.049Å, respectively, are scattered from stationary free electrons. The scattered wavelength (λ′) is measured as a function of the scattering angle (θ). If Compton shift is 𝛥λ=λ′−λ, then which of the following statement(s) is/are true:
( h = 6.63 x10-34J.s, me = 9.11x10-31 kg, c = 3 x 108m/s )

• A. For γ-rays, λ′ max ≈ 0.098Å
• B. For X-rays, (Δλ)max is observed at θ= 180°
• C. For X-rays, (Δλ)max ≈ 1.049Å
• D. For γ-rays, at θ= 90° , λ′ ≈0.049Å

Answer 1

Answer: (A), (B)

For γ-rays, λ′ max ≈ 0.098Å

Answer 2

The correct options are: A and B