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MCQ
In Compton scattering, if the scattering angle is 90°, the change in wavelength is:
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A h/mc
B 2h/mc
C h/(2mc)
D Zero
Explanation

Δλ = (h/mc)(1-cos90°) = (h/mc)(1-0) = h/mc = 2.43 × 10⁻¹² m (Compton wavelength).

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