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2.3.3a Thermal radiation

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Question 17

Two identical metal cans, X and Y, are filled with equal volumes of hot water at the same initial temperature of 80 ∘C80\ ^\circ\text{C}80 ∘C.

Can X has a dull black outer surface, and can Y has a shiny silver outer surface. Both cans are left to cool in a room at room temperature.

How and why would the temperatures of the water in the two cans differ after a few minutes?

A

Can X would have a lower temperature than Can Y because dull black is a good emitter of radiation.

B

Can X would have a lower temperature than Can Y because dull black is a poor emitter of radiation.

C

Can X would have a higher temperature than Can Y because dull black is a good emitter of radiation.

D

Can X would have a higher temperature than Can Y because dull black is a poor emitter of radiation.

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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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