Depending on the radiating properties, a body will be black when
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40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is
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Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by
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A perfect black body is one which
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A grey body is one whose absorptivity
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Thermal conductivity of solid metals with rise in temperature normally
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Unit of thermal conductivity in M.K.S. units is
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