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Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 23

9702Electromagnetic spectrum

An electromagnetic wave has a wavelength of 2.1 cm in a vacuum. Which region of the electromagnetic spectrum contains this wave?

  1. Ainfrared
  2. Bmicrowave
  3. Cradio wave
  4. Dvisible light

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Correct answer: B. microwave

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