Question
A spherical black body with a radius 12 cm radiates 450 w power at 500 k . If the radius were halved and the temperature doubled, the power radiated in watt would be ?Read 1 Solution.
use the formula
E=AeηT4 where η is stefans constant
Take A=4πr2 and e=1 as it is black body
compare it with new radius and temp.
Best SolutionNIKHIL VARSHNEY 12 year ago
is this solution helpfull: 22 4