a spherical black body with radius 12 cm radiates 450 W power at 500 K . if radius is halved and temperature is doubled , then power radiated in watt would be
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Power radiated by black body is proportional to Area and Temp raised to power 4,
P = σA(T^4) ,Stefan-Boltzmann Law
Radius is halved area becomes one fourth Temp become doubled.
P becomes 4 times.
Power becomes 1800 W
P = σA(T^4) ,Stefan-Boltzmann Law
Radius is halved area becomes one fourth Temp become doubled.
P becomes 4 times.
Power becomes 1800 W
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