A light pulse from an optical sensor passes from air into a transparent protective cover. The ray meets the boundary at an angle of 35∘ 35^\circ\,35∘ to the normal. The frequency and speeds of the light are shown in the table.
| Quantity | Value |
|---|---|
| Frequency of the light | 5.0 × 1014 Hz |
| Speed in air | 3.0 × 108 m s-1 |
| Speed in the cover | 1.9 × 108 m s-1 |
Calculate the wavelength of the light in the cover.
Explain what happens to the wavelength and direction of the light as it enters the cover.
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.