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Physics · May / June 2018 · Paper 12 · Question 26

5054General properties of waves

A communications system uses microwaves with a wavelength of 15 cm. The speed of light is 3.0 × 10⁸ m / s. What is the frequency of the microwaves?

  1. A2.0 × 10⁷ Hz
  2. B4.5 × 10⁷ Hz
  3. C2.0 × 10⁹ Hz
  4. D4.5 × 10⁹ Hz

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Correct answer: C. 2.0 × 10⁹ Hz

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