Irradiation Heat Transfer. Thermal radiation is the transfer of heat by the means of the electromagnetic radiation generated by the thermal motion of particles in matter. To find the emissivity of different material surface.
The amount of radiation and the quality of the radiation depend upon temperature. Heat can be transferred in three ways. Radiation heat transfer is measured by the device known as thermocouple.
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Conduction metals are good. It always flows from a region of high temperature to a region of low temperature ie. The amount of radiation and the quality of the radiation depend upon temperature. L is used here instead of b because it is the si symbol for spectral radiancethe l in c 1l refers to that.