The Reflection of Infra-red Radiation from a Surface.
When infra-red radiation falls on an
some will be reflected and some will be absorbed.
The greater the proportion of radiation that is reflected,
the less will be absorbed.
An object with a matt or dark
will be a poor reflector of infra-red radiation.
An object with a shiny or light surface
will be a good reflector of infra-red radiation.
foil can be placed behind a
in a room to increase its efficiency.
The foil reflects radiation back into the room which
heats the air rather than heating the wall.
This adds to the efficiency of convection in the room.
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