106bhaiyya .. Q = σT2 or σT4 ?? or am i wrong??
An indirectly heated filament is radiating maximum energy of wavelength 2.16*10-5cm Find the net amount of heat energy lost per second per unit area. the temperature of surrounding air is 13°C .Assuming it as black body .Given b=0.288cmK ???
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3 Answers
62λmT=b
T = 13211 K
Stefan boltzman'
Q = σT4 -----(1)
Q is the energy lost per unit time per unit area
where σ is the Stefan-Boltzmann constant 5.67 x 10-8 W/m2 - K4.
find the answer by direct substitution..
