A laser in a school laboratory emits red light. The table gives data about the light.
| Quantity | Value |
|---|---|
| Frequency of the laser light | 4.74 × 1014 Hz |
| Speed of light in air | 3.0 × 108 m/s |
Calculate the wavelength of the laser light.
94 exam-style questions on Edexcel GCSE Physics 7.2 The Universe and red-shift, covering 7.2.1 Big Bang and Steady State theories, 7.2.2 Evidence for the Big Bang, 7.2.3 The Doppler effect and red-shift, 7.2.4 Red-shift as evidence for an expanding Universe, and 7.2.5 The CMB and the accepted model. Each one has a worked solution and a mark scheme showing where the marks go.