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Physics (AS & A Level) · Oct / Nov 2021 · Paper 12 · Question 26

9702Electromagnetic spectrum

Electromagnetic waves of frequency 30 THz are in a vacuum. In which region of the electromagnetic spectrum are the waves?

  1. Ainfrared
  2. Bmicrowave
  3. Cultraviolet
  4. Dvisible light

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Correct answer: A. infrared

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