The sun having surface temperature T_s radiates like a black body. The radius of sun is R_s and earth is at a distance R from the surface of sun. Earth absorbs radiations falling on its surface from sun only and is at constant temperature T. If radiations falling on earth's surface are almost parallel and earth also radiates like a blackbody, then

The sun having surface temperature T_s radiates like a black body. The

1.	The sun having surface temperature T_s radiates like a black body. The radius of sun is R_s and earth is at a distance R from the surface of sun. Earth absorbs radiations falling on its surface from sun only and is at constant temperature T. If radiations falling on earth's surface are almost parallel and earth also radiates like a blackbody, then
Answer» `T=T_s=SQRT(R/(2R))` `T=T_s` `T=T_s/2 sqrt(R_s/R)` `T=T_ssqrt(R_s/R)` ANSWER :A

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