A source emits an infrared pulse and an X-ray pulse across a chamber containing a vacuum.
| Pulse | Frequency in Hz |
|---|---|
| infrared | 3.0 × 1013 |
| X-ray | 6.0 × 1018 |
Compare the speeds and the wavelengths of the two pulses. Use calculations in your answer.
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.