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2.3.3a Thermal radiation

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Question 56

A hot, matte-black object emits thermal radiation. It is desired to reduce the rate at which radiation is emitted from its surface.

Three suggestions are made:

  1. Polish the surface of the object to make it shiny.
  2. Raise the temperature of the object.
  3. Decrease the surface area of the object.

Which of these suggestions would achieve the desired result?

A

1 only

B

1 and 2 only

C

1 and 3 only

D

1, 2 and 3

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2.3.3a Thermal radiation Questions

  1. IGCSE
  2. /Physics
  3. /2.3.3a Thermal radiation

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.

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