O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2017 · Q171 Mark
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?
Aabsorbs most radiation: dull black, reflects most radiation: dull white
Babsorbs most radiation: dull black, reflects most radiation: shiny white
Cabsorbs most radiation: shiny black, reflects most radiation: dull black
Dabsorbs most radiation: shiny white, reflects most radiation: dull black
✓ Correct answer
B: absorbs most radiation: dull black, reflects most radiation: shiny white
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