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6.3 Black body radiation

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Question 16

A conveyor drying system uses metal plates. Infrared heaters warm the plates, which then emit infrared radiation towards the material being dried.

A manufacturer tests two identical plates with different coatings, P and Q. Each plate is exposed to the same infrared heater for 5 minutes under identical conditions.

In a separate test, both plates are maintained at 80 °C. An infrared detector is placed at the same distance from each plate.

CoatingTemperature before heating in °CTemperature after heating in °CInfrared detector reading at 80 °C in arbitrary units
P205874
Q203121

Explain which coating the manufacturer should use. Use all the results from the tests.

[4]
Markscheme

6.3 Black body radiation Questions

  1. GCSE
  2. /Physics
  3. /6.3 Black body radiation

106 exam-style questions on AQA GCSE Physics 6.3 Black body radiation, covering 6.3.1 Emission and absorption of infrared radiation and 6.3.2 Perfect black bodies and radiation. Each one has a worked solution and a mark scheme showing where the marks go.

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