Physics (AS & A Level) · Oct / Nov 2020 · Paper 13 · Question 28
9702Diffraction
What is meant by diffraction?
- Athe change in observed frequency when a wave source moves relative to an observer
- Bthe formation of nodes and antinodes by two progressive waves travelling in opposite directions
- Cthe spreading of a wave around the edge of an obstacle
- Dthe superposition of two waves when they meet
As printed in the paper
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Correct answer: C. the spreading of a wave around the edge of an obstacle
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