Questions
A black body at a temperature of radiates heat at the rate of . When its temperature rises to the heat radiated will be
detailed solution
Correct option is C
Heat radiated by black bodyE=σAT4⇒EαT4 or E1E2=T14T24 or 20E2=50010004=124=116 ⇒E2=16×20calm-2 s-1 =320calm-2 s-1Similar Questions
A Black metal foil receives radiation of power P from a hot sphere at absolute temperature T, kept at a distance d. If the temperature is doubled and distance is halved, then Power will be
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