Engineering, 21.11.2019 01:31, kristygodwin

12–75 the emissivity of a tungsten filament can be approximated to be 0.5 for radiation at wavelengths less than 1 mm and 0.15 for radiation at greater than 1 mm. determine the average emissivity of the filament at (a) 2000 k and (b) 3000 k. also, determine the absorptivity and reflectivity of the filament at both temperatures.

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12–75 the emissivity of a tungsten filament can be approximated to be 0.5 for radiation at wavelengt...