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Physics (AS & A Level) · Oct / Nov 2021 · Paper 13 · Question 26

9702Electromagnetic spectrum

A smooth surface has bumps on the surface that are smaller than the wavelength of visible light. What is the approximate maximum size of the largest bumps on the surface?

  1. A20 nm
  2. B350 nm
  3. C720 nm
  4. D5.0 μm

As printed in the paper

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Correct answer: B. 350 nm

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