Diffuse radiation definition radiation heat transfer
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If the amounts of radiation energy absorbed, reflected and transmitted when radiation strikes a surface are measured in percentage of the total energy in the incident electromagnetic waves the total energy will be divided into three groups They are called absorptivity (α), reflectivity (ρ) and transmissivity (t)
If the amounts of radiation energy absorbed, reflected and transmitted when radiation strikes a surface are measured in percentage of the total energy in the incident electromagnetic waves the total energy will be divided into three groups They are called absorptivity (α), reflectivity (ρ) and transmissivity (t)
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Conduction and convection are heat transfer processes that require the presence of a medium. Radiation heat transfer is characteristically different from the other two in that it does not require a medium and, in fact it reaches maximum efficiency in a vacuum.
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