A lizard's body temperature rises from 18 ∘C18\ ^\circ\text{C}18 ∘C to 32 ∘C32\ ^\circ\text{C}32 ∘C as its enclosure warms. Which statement about the lizard at these two temperatures is correct?
At both temperatures, most of the radiation emitted by the lizard is visible light.
At 32 ∘C32\ ^\circ\text{C}32 ∘C, the lizard emits infrared radiation but no longer absorbs any.
At 18 ∘C18\ ^\circ\text{C}18 ∘C, the lizard absorbs infrared radiation but does not emit any.
At 32 ∘C32\ ^\circ\text{C}32 ∘C, the lizard emits more energy each second by infrared than at 18 ∘C18\ ^\circ\text{C}18 ∘C.
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.