1.

The earth receives at its surface radiation from the sun at the rate of 1400" Wm"^(-2) The distance of the centre of the sun from the surface of the earth is 1.5xx10^(11) m and the radius of the sun is 7xx10^(8)m. Treating the sun as a black body, it follows from the above data that its surface temperature is ........K

Answer»

3925
5803
1327
9348

Answer :B


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