A ray of light with a frequency of 5.0 × 1014 Hz passes through three materials.
The Table shows the speed of the light in each material.
Table
| Material | Speed of light in m/s\text{m/s}m/s |
|---|---|
| air | 3.00 × 108 |
| water | 2.25 × 108 |
| diamond | 1.24 × 108 |
Calculate the wavelength of the light in water.
Calculate the decrease in the wavelength of the light when it passes from water into diamond.
The ray passes from water into diamond at an angle to the normal.
Explain how the direction of the ray changes.
A ray that passes from water into diamond along the normal slows down but does not change direction.
Explain why.
84 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.