Question

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.

Answer 1

Answer:

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