An electric laboratory heating element glows red when current passes through it. The manufacturer's manual states:
"The element glows to emit visible light and also emits a second type of radiation which transfers thermal energy outwards by radiation."
State the name of the region of the electromagnetic spectrum that transfers thermal energy.
State:
one similarity between visible light and the radiation identified in (a).
State:
one difference between visible light and the radiation identified in (a).
Some surfaces are better at absorbing radiation than others.
Describe an experiment to show whether a matt black surface or a shiny silver surface is the better absorber of radiation.
State two variables in the experiment you described that must be kept identical during the test to ensure a fair comparison.
99 exam-style questions on CIE IGCSE Physics 2.3.3a Thermal radiation. Each one has a worked solution and a mark scheme showing where the marks go.