Physics · May / June 2016 · Paper 11 · Question 18
5054Radiation
Which statement about thermal radiation is correct?
- AIn a vacuum, thermal radiation travels at the speed of light.
- BThermal radiation is a longitudinal wave.
- CThermal radiation travels as an ultra-violet wave.
- DWhite surfaces are better emitters of thermal radiation than black surfaces.
As printed in the paper
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Correct answer: A. In a vacuum, thermal radiation travels at the speed of light.
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