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Physics (AS & A Level) · Oct / Nov 2021 · Paper 12 · Question 28

9702Diffraction

A beam of laser light is directed towards a narrow slit. After emerging from the other side of the slit, the diffracted light then falls on a screen. What is the pattern of light seen on the screen?

  1. AA single small dot
  2. BA horizontal line
  3. CA vertical line
  4. DA large circle

As printed in the paper

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Correct answer: B. A horizontal line

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