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[" A spherical body of area "A" and emissivity "0.6" is kept inside a black "],[" body.What is the rate at which energy is radiated per second at "],[" temperature "T],[qquad [" B."0.6cAT^(4)],[" c."0.8cAT^(4)],[" D."1.0cAT^(4)]]

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