CAIE IGCSE Physics Surface Effects on Infrared
Practise using colour and texture to compare infrared absorption, emission and reflection and apply the result to clothing, buildings and containers.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- identify dull black surfaces as good absorbers and emitters but poor reflectors
- identify shiny white or silver surfaces as poor absorbers and emitters but good reflectors
- apply these properties to reduce heating or thermal loss in a stated practical context
2.3.3.3—Effect of surface colour (black or question 1
Fig. 3.1 shows a mains electric heater used to heat a small room.
Fig. 3.1
Explain why the shiny metal surface behind the heating elements increases the thermal energy radiated into the room.
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