A lizard is resting beneath a heat lamp. During a short period, its body absorbs infrared radiation at a greater rate than it emits infrared radiation. Consider only the effect of this radiation on its thermal energy.
Which statement describes what happens to the lizard's body temperature during this period?
Its temperature rises, because the lizard gains energy overall.
Its temperature stays constant, because the lizard absorbs and emits infrared radiation.
Its temperature falls, because the lizard emits infrared radiation as well.
Its temperature rises, because the lizard emits less infrared radiation as it warms.
106 exam-style questions on AQA GCSE Physics 6.3 Black body radiation, covering 6.3.1 Emission and absorption of infrared radiation and 6.3.2 Perfect black bodies and radiation. Each one has a worked solution and a mark scheme showing where the marks go.