An acoustic sensor embedded in an ice sheet sends a sound pulse through the ice into seawater below.
The table gives data for the sound pulse.
| Medium | Speed in m/s\mathrm{m/s}m/s | Wavelength in m\mathrm{m}m |
|---|---|---|
| Ice | 3800 | 0.076 |
| Seawater | 1500 | -- |
The sound pulse reaches the boundary at an angle to the normal.
Calculate the wavelength of the sound pulse in seawater.
Explain how the direction of the sound pulse changes as it enters the seawater.
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.