Engineers maintain equipment at an outdoor electricity substation.
State one harmful effect of intense infrared radiation.
Engineers use a thermal imaging camera to find components that have become hot.
Explain how the camera can be used to find these components.
During one outdoor task, an engineer has uncovered skin exposed to sunlight.
| Quantity | Value |
|---|---|
| ultraviolet energy received per square metre in one minute | 600 J/m2 |
| exposure time | 20 min |
Calculate the total ultraviolet energy received per square metre during the task.
Suggest two ways the engineer can reduce exposure to ultraviolet radiation while working outdoors.
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.