Radiation is when heat moves around the electromagnetic waves like light does, any hot object will give out (Emit) heat radiation and the hotter it is , the more radiation is given out. This type of radiation is called Infra-Red and too much of it will cause sunburn. Dark, matt colours like black will adsorb and give out the most infra-red radiation and light, shiny coulours like wihte will reflect it.
The main difference with radiation is that Conduction and Convection can only happen in solids, liquids or gases, whereas radiation will happen in an empt space (Vacuum). This is the reason we get heat from the sun.
Things that use colour radiation are Solar Panels, Pipes, Houses in hot Countries and a Kettle.
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