If we consider solar system consisting of the earth and sun only as...

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If we consider solar system consisting of the earth and sun only as one of the ideal thermodynamic system. The sun works as source of energy having temperature \( 6000 \mathrm{~K} \) and the
\( \mathrm{P} \) earth as sink having temperature \( 300 \mathrm{~K} \), the efficiency of solar

W system would be on the basis of exchange of radiations
[MP PMT 2009]
(a) \( 30 \% \)
(b) \( 65 \% \)
(c) \( 75 \% \)
(d) \( 95 \% \)
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