An engineer takes a thermal image of two identical bearings while both bearings are operating. Bearing P appears pale yellow and bearing Q appears dark purple.
Which conclusion about the temperatures of the bearings is supported by the thermal image?
Bearing P is cooler than bearing Q.
Bearing Q is cooler than bearing P.
The bearings have the same temperature because they are identical.
Their temperatures cannot be compared because both bearings emit infrared.
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.