FORTY years ago our knowledge concerning the radiation and absorption of heat was very meagre. We believe that the earliest experiment in this direction is to be found in that wonderful book ...
However, despite their name, radiators actually transfer most of their heat to a room by convection, not radiation. Normally radiant heaters must be at least red hot before they are effective.
Radiation is the transfer of heat energy from a region of high temperature to a region of low temperature by infrared radiation. Unlike conduction and convection, radiation takes place without the ...