The Table shows the wavelength and frequency of four electromagnetic waves.
Table
| Wavelength in m\text{m}m | Frequency in Hz\text{Hz}Hz |
|---|---|
| 1.0 × 103 | 3.0 × 105 |
| 1.0 | 3.0 × 108 |
| 1.0 × 10-6 | 3.0 × 1014 |
| 1.0 × 10-10 | ? |
Use data from the Table to show that the frequency of the waves is inversely proportional to their wavelength.
Determine the missing frequency in the Table.
Name the group of the electromagnetic spectrum that the wave with a wavelength of 1.0 × 103 m belongs to, and the group that the wave with a wavelength of 1.0 × 10-6 m belongs to.
Explain why frequency × \times\,× wavelength has the same value for every wave in the Table.
Gamma rays are used to sterilise surgical instruments after they have been sealed inside plastic packets.
Explain why gamma rays are suitable for this use.
48 exam-style questions on OCR GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves in space, 5.2.2 Energy transfer by electromagnetic waves, 5.2.3 Frequency and wavelength across the spectrum, 5.2.4 Groups of the electromagnetic spectrum, 5.2.5 Visible light and the limits of human sight, 5.2.6 Light as an electromagnetic wave, 5.2.7 Uses of electromagnetic waves, 5.2.8 Hazards of ultraviolet, X-rays and gamma rays, 5.2.9 Ultrasound and imaging inside the body, and 5.2.10 Radio waves and oscillating circuits. Each one has a worked solution and a mark scheme showing where the marks go.