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Physics (AS & A Level) · Oct / Nov 2017 · Paper 13 · Question 29

9702Diffraction

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

  1. Aa 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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