Equal masses of water in identical cans are heated by infrared radiation. Only the surface finishes differ. The initial temperatures and exposure times are the same. Which measurement is most useful for comparing absorption?
the temperature rise of the water
the final mass of each metal can
the diameter of each thermometer
the total height of each metal can
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.