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4.3 Sound, ultrasound and infrasound

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Question 31

Two sources produce sound waves P and Q in air. The frequency of Q is twice the frequency of P. Wave P passes into water, where its speed becomes four times its speed in air. Wave Q remains in air.

What is the ratio of the wavelength of P in water to the wavelength of Q in air?

[1]

$2 : 1$

$1 : 2$

$1 : 8$

$8 : 1$

Markscheme

4.3 Sound, ultrasound and infrasound Questions

GCSE
Physics
4.3 Sound, ultrasound and infrasound

112 exam-style questions on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound, covering 4.3.1 Sound waves, vibrations and the human ear, 4.3.2 Ultrasound and infrasound, 4.3.3 Uses of ultrasound and infrasound, and 4.3.4 Sound waves passing between media. Each one has a worked solution and a mark scheme showing where the marks go.

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