Physics · Oct / Nov 2016 · Paper 11 · Question 20
5054Radiation
Which statement about the transfer of thermal energy is correct?
- ATransfer by radiation does not require a medium.
- BTransfer is from a region of lower temperature to one of higher temperature.
- CTransfer upwards in fluids is mainly through the vibrations of neighbouring particles.
- DTransfer in solids is by means of density changes in the material.
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Correct answer: A. Transfer by radiation does not require a medium.
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