A maintenance worker checks a hot water pipe in a plant room. An infrared thermometer detects infrared radiation from the pipe and shows a temperature reading on a screen. The worker can read the screen but cannot see the radiation travelling from the pipe.
Explain why the worker cannot see the infrared radiation from the pipe directly but can read the temperature on the screen.
93 exam-style questions on AQA GCSE Physics 6.2 Electromagnetic waves, covering 6.2.1 Types of electromagnetic waves, 6.2.2 Properties of electromagnetic waves 1, 6.2.3 Properties of electromagnetic waves 2, 6.2.4 Uses and applications of electromagnetic waves, 6.2.5 Lenses, and 6.2.6 Visible light. Each one has a worked solution and a mark scheme showing where the marks go.