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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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Correct option is A
P=eAσT4d2PαT4d2P1P2=T14T24×d22d12P1P2=116×14P2=64PSimilar Questions
A black body at a temperature of radiates heat at the rate of . When its temperature rises to the heat radiated will be
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