An observatory records an electromagnetic signal, P. The table gives the frequency of signal P and two reference frequencies.
| Information | Frequency / Hz |
|---|---|
| highest frequency in the visible-light range | 7.5 × 1014 |
| signal P | 2.0 × 1016 |
| lowest frequency in the X-ray range | 3.0 × 1016 |
Which group of the electromagnetic spectrum contains signal P? Explain how the frequencies in the table support 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.