Physics (AS & A Level) · Oct / Nov 2025 · Paper 12 · Question 28
9702Diffraction
A light wave passes through a single slit and a diffraction pattern forms. What happens to the frequency and the speed of the wave when it is diffracted?
- Afrequency decreases, speed increases
- Bfrequency increases, speed decreases
- Cfrequency no change, speed decreases
- Dfrequency no change, speed no change
As printed in the paper
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Correct answer: D. frequency no change, speed no change
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