Physics · Oct / Nov 2017 · Paper 11 · Question 17

Four similar metal plates are the same distance from a heater that emits infra-red radiation. The plates are painted dull black, dull white, shiny black and shiny white. Which plate absorbs the most radiation and which plate reflects the most radiation?

1. Aabsorbs most radiation: dull black; reflects most radiation: dull white
2. Babsorbs most radiation: dull black; reflects most radiation: shiny white
3. Cabsorbs most radiation: shiny black; reflects most radiation: dull black
4. Dabsorbs most radiation: shiny white; reflects most radiation: dull black

As printed in the paper