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Physics (AS & A Level) · May / June 2020 · Paper 11 · Question 23

9702Progressive waves

The graph shows the variation with time of the displacement of an electromagnetic wave at a point. The wave is travelling in a vacuum. What is the amplitude and what is the wavelength of the wave?

  1. Aamplitude 3.0, wavelength 6000
  2. Bamplitude 6.0, wavelength 6000
  3. Camplitude 3.0, wavelength 7500
  4. Damplitude 6.0, wavelength 7500

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Correct answer: A. amplitude 3.0, wavelength 6000

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