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A body coated black at 600Ksurrounded by atmosphere at 300K has cooling rate the same body at 900K surrounded by the same atmosphere will have cooling rate
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Correct option is C
Stefan's law is E=σT4-T4s, here E is energy radiated by a black body, σ is stefan's constant,T is temperature of the body for given temperature T1,T2 E1E2=T14-Ts4T24-Ts4 substitute the given temperature and cooling rate E1=r0 in the above equationr0E2=6004-30049004-3004⇒r0E2=64-3494-34=1296-816561-81=12156480=316 E2=16r03Similar Questions
The radiation emitted by a star A is 10000 times that of the sun. If the surface temperatures of the sun and star A are 6000 K and 2000 K, respectively, the ratio of the radii of the star A and the sun is
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