Radiation is the continual emission of infrared waves from the surface of all bodies, transmitted without the aid of a medium.
Rate of heat transfer is affected by:
- Colour and texture of the surface
- Surface temperature
- Surface area
Dull black surfaces are better absorbers and emmiters of infrared radiation than shiny smooth surfaces.
Surface temperature Rate of radiation increases as the temperature increases.
Surface area The rate of radiation increases aas the surface area increases.
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http://www.youtube.com/watch?v=wz6wzOtv6rs
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