A sound wave travels from the air in a workshop into an aluminium layer in a test panel, then from the aluminium into an acrylic layer. The sound speeds in the three materials are shown in the table.
| Material | Speed of sound in m/s\text{m/s}m/s |
|---|---|
| air | 340 |
| aluminium | 6400 |
| acrylic | 2750 |
Explain what happens to the speed, frequency and wavelength of the sound at each of the two boundaries. Use data from the table in your answer.
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.