During the night, the Earth's surface cools by emitting radiation. The diagram below shows two different regions, P and Q, at night.
Water vapor is a highly effective absorber and emitter of infrared radiation, whereas dry air is largely transparent to it.
Explain why the ground in Region P (dry desert) cools down much more rapidly overnight than the ground in Region Q (humid wetland).
Black body radiation (physics only) Questions
Practise AQA GCSE Physics Black body radiation (physics only) with exam-style questions for Foundation and Higher tier. 9 questions covering Emission and absorption of infrared radiation and Perfect black bodies and radiation, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.