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2.3 Transfer of thermal energy

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Question 177

Why are the absorber plates in solar water heaters usually painted matt black?

A

Matt black surfaces are good reflectors of infrared radiation.

B

Matt black surfaces are poor emitters of infrared radiation.

C

Matt black surfaces are poor absorbers of infrared radiation.

D

Matt black surfaces are good absorbers of infrared radiation.

Markscheme

2.3 Transfer of thermal energy Questions

  1. IGCSE
  2. /Physics
  3. /2.3 Transfer of thermal energy

301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.

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