A materials laboratory compares infrared absorption by two finishes for roofing samples. Finish X is matt black and finish Y is shiny silver. Four otherwise identical samples start at the same temperature and receive infrared radiation for the same time. One sample with each finish is tested at position A and one sample with each finish is tested at position B. Which result would give the strongest evidence that finish X is the better absorber of infrared radiation?
For both finish X and finish Y, the sample at position A has a greater temperature rise than the sample at position B.
At both position A and position B, the sample with finish X has a greater temperature rise than the sample with finish Y.
Each sample has a similar temperature rise when its test is repeated without changing its position.
The sample with finish X at position A has a greater temperature rise than the sample with finish Y at position B.
96 exam-style questions on Edexcel GCSE Physics 5.3 Black body radiation, covering 5.3.1 Emission of radiation and temperature, 5.3.2 Radiation balance and constant temperature, and 5.3.3 The temperature of the Earth. Each one has a worked solution and a mark scheme showing where the marks go.