A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be :(a) 450(b) 1000(c) 1800(d) 225
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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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