Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8

Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8 having same are at 500K will radiate

(a) 111 J/s
(b) 421 J/s
(c) 321 J/s
(d) 221 J/s

111 J/s

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MH2008

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