The wave equation

1 mark · Normal

Which change below would double the wave speed if the frequency of a wave stays the same?

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Correct option: Double the wavelength.

Common mistakes: Choosing 'double the frequency'

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Marking points

A1 · 1 mark · Selects 'Double the wavelength.'

Worked solution

If frequency is constant, wave speed is directly proportional to wavelength. Doubling λ will double wave speed.