A laboratory uses ultraviolet radiation to disinfect the surfaces of reusable trays. The lamp is inside a cabinet, which has a safety system that switches the lamp off before a technician can open it.
Explain how the safety system reduces the risk to the technician when the cabinet is opened.
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.