Electromagnetic waves have many uses.
The Table shows three uses of electromagnetic waves.
Table
| Use | Type of electromagnetic wave |
|---|---|
| cooking food quickly in an oven | .................... |
| detecting forged banknotes | .................... |
| sterilising surgical instruments | .................... |
Complete the Table.
Give one use of X-rays and one use of radio waves.
A hospital worker takes X-ray images of many patients every day. The worker stands behind a lead screen while each image is taken.
Explain why.
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.