Question

The value of Compton shift when the angle of scattering is 90°​

Answer 1

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We add this shift to the incident wavelength to obtain the scattered wavelength. The largest Compton shift occurs at the angle θ when 1−cosθ has the largest value, which is for the angle θ=180°.

Answer 2

Explanation:

Then we add this shift to the incident wavelength to obtain the scattered wavelength. The largest Compton shift occurs at the angle θ when 1−cosθ has the largest value, which is for the angle θ=180°.