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Physics (AS & A Level) · Oct / Nov 2018 · Paper 12 · Question 28

9702Diffraction

What happens when waves pass through a gap equal to their wavelength?

  1. AThere is diffraction and the wavelength decreases.
  2. BThere is diffraction and the wavelength stays the same.
  3. CThere is no diffraction and the wavelength decreases.
  4. DThere is no diffraction and the wavelength stays the same.

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Correct answer: B. There is diffraction and the wavelength stays the same.

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