A monitoring station receives three electromagnetic signals in a vacuum. The wavelength of each signal is recorded.
| Signal | Wavelength |
|---|---|
| A | 0.30 m |
| B | 600 nm600\ \text{nm}600 nm |
| C | 0.30 nm0.30\ \text{nm}0.30 nm |
For this question, visible light has wavelengths from 400 nm400\ \text{nm}400 nm to 700 nm700\ \text{nm}700 nm.
The station also receives signal D, which has a frequency of 1.5 × 1015 Hz. The speed of electromagnetic waves in a vacuum is 3.0 × 108 m/s.
Give the electromagnetic group to which signal B belongs.
Explain why signal C has a higher frequency than signal B. Use data from the table in your answer.
Calculate how many times greater the frequency of signal B is than the frequency of signal A.
Calculate the wavelength of signal D in nm. Use your answer to give the electromagnetic group to which signal D belongs.
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.