Two X-ray sources emit waves that travel through a vacuum. The table gives the frequency of each wave.
| Source | Frequency |
|---|---|
| A | 6.0 × 1018 Hz |
| B | 4.0 × 1018 Hz |
Electromagnetic waves travel at 3.0 × 108 m/s in a vacuum.
Calculate the wavelength of the X-rays from source A.
Explain whether the wavelength of the X-rays from source B is longer or shorter than the wavelength of the X-rays from source A.
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.