The Table shows the wavelengths of three electromagnetic waves.
Table
| Wave | Type of wave | Wavelength in m\text{m}m |
|---|---|---|
| X | radio wave | 1500 |
| Y | microwave | 0.12 |
| Z | visible light | 5.0 × 10-7 |
All electromagnetic waves travel at 3.0 × 108 m/s in air.
Which wave, X, Y or Z, has the highest frequency?
Give a reason for your answer.
Use the equation: wave speed=frequency×wavelength\text{wave speed} = \text{frequency} \times \text{wavelength}wave speed=frequency×wavelength
Calculate the frequency of wave X.
Describe how the frequency of electromagnetic waves changes as the wavelength gets shorter.
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.