Assume that the solar radiation incident on Earth is 1330 W/m2 (at the top of the atmosphere). Find the total power radiated by the Sun, taking the average separation between Earth and the Sun to be 1.489 * 1011 m. Answer in units of W.

The total power radiated by the sun is 3.71*10^26W

Explanation:

The Earth is spherical in shape

Therefore, Area = 4πr^2 = 4*3.143 * (1.489*10^11) ^2 = 2.79*10^23m^2

Power radiated by the Sun = solar radiation on Earth * Area = 1330W/m^2 * 2.79*10^23m^2 = 3.71*10^26W