What is the difference between radiation, emission and reflection in terms of heat?

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Heat IS radiation in the sence that it is infrared electromagnetic radiation.

Emission is how much energy (heat) one radiates outwards due to ones internal energy. Normally this behaviour is modelled as a blackbody radiator with an emissivity and absorbtivity (spelling please).

Reflection is the part of incoming radiation that is not absorbed by the blackbody (unless it is a perfect blackbody) and is thus reflected outwards.

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Shubham
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Shubham

Updated on April 11, 2020

Comments

  • Shubham
    Shubham over 3 years

    I am reading heat transfer and I get confused between these terms. I know they are very basic terms but I can't relate them with heat. Any help is appreciated.

  • garyp
    garyp over 3 years
    In my mind heat is not radiation, and radiation is not the net of absorption and emission. I think the lesson of this answer is that the words have different meanings to different people and in different contexts.