{ Assuming the sun to be a spherical body of radius R at a temperature of TK, evaluate the total radiant power incident on earth, at a distance r from the sun. Take radius of earth as r}}_0.

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Q. Assuming the sun to be spherical body of radius R at a temperature of T K, evaluate the total radiant power incident on earth, at a distance frotm the sun-( when radius of earth is

r_{0}

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Q. Assuming the sun to be a spherical body of radius

R

at a temperature

T

K, evaluate the total radiant power incident on earth. (

r

is the distance between the sun and the earth,

r_{0}

is the radius of earth and

σ

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Q. Assuming the sum to be spherical body of radius

R

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K

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The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m². The distance from the earth to the sun is about 1.5 10¹¹ m, and the radius of sun is about 0.7 10⁹m If the sun radiates as ideal black body, what is the temperature of its surface?

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