In a food laboratory, radiation M is used to warm water-rich contents inside sealed containers. Radiation U is used to disinfect the outside surfaces of equipment. A technician's hand is accidentally exposed to a high-intensity beam from either source.
Explain how the harm caused by M could differ from the harm caused by U, and suggest one action that would reduce the technician's exposure.
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.