A maintenance robot must send inspection data to a receiver a few metres away. It must also locate bearings that are warmer than their surroundings but look the same.
Which type of electromagnetic radiation could be used for both tasks?
radio waves
microwaves
infrared radiation
visible light
104 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation, covering 5.4.1 Dangers of electromagnetic radiation, 5.4.2 Uses of electromagnetic radiation, 5.4.3 Radio waves and oscillations in circuits, and 5.4.4 Changes in atoms and nuclei generating radiation. Each one has a worked solution and a mark scheme showing where the marks go.