alleryIn Compton scattering at 90° (cos 90 = 0), wavelength shift:
AΔλ = h/(m_e c) = 2.43 × 10⁻¹² m (Compton wavelength)
B2 nm
C0
DAlways λ/2
Answer & Solution
Correct answer: A. Δλ = h/(m_e c) = 2.43 × 10⁻¹² m (Compton wavelength)
Δλ = (h/m_e c)(1 - cos θ).
At θ = 90°: Δλ = h/(m_e c) ≈ 2.43 × 10⁻¹² m = 2.43 pm.
Called the Compton wavelength of electron.
Maximum at θ = 180°: Δλ = 2 × Compton wavelength.
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