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Two spheres of the same material have radii 1m and 4m and temperatures 4000K and 2000K respectively. The energy radiated per second by the first sphere is greater than that by the second.

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Energy radiated per second by the first sphere
`E_1=epsilonsigmaT^4A=epsilonsigma(4000)^4xx4pixx11xx1`
`=1024xxpixx10^12xxepsilonsigma`
`E_1=E_2`
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