A sound wave with a frequency of 500 Hz travels through the air and then into the water of a swimming pool.
The Table shows the speed of sound in three materials.
Table
| Material | Speed of sound in m/s\text{m/s}m/s |
|---|---|
| air | 340 |
| water | 1500 |
| steel | 5000 |
Use the equation: wave speed=frequency×wavelength\text{wave speed} = \text{frequency} \times \text{wavelength}wave speed=frequency×wavelength
Calculate the wavelength of the sound in air.
State the frequency of the sound wave in the water.
Calculate the wavelength of the sound in the water.
A student says:
'When sound passes from air into water, its wavelength gets shorter.'
Explain whether the student is correct. Use the Table in your answer.
52 exam-style questions on OCR GCSE Physics 5.1 Wave behaviour, covering 5.1.1 Describing wave motion, 5.1.2 Wavelength and frequency, 5.1.3 Wave speed, frequency and wavelength, 5.1.4 Wave speed problems, 5.1.5 Transverse and longitudinal waves, 5.1.6 Sound waves crossing between media, 5.1.7 Reflection, transmission and absorption at interfaces, 5.1.8 Sound waves and vibrations in solids, 5.1.9 Frequency range and human hearing, 5.1.10 Modelling waves with water ripples and sound, and 5.1.11 Evidence that the wave travels, not the medium. Each one has a worked solution and a mark scheme showing where the marks go.