College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 89

The intensity of solar radiation at the top of Earth's atmosphere is 1 370 W/m 3. Assuming 60% of the incoming solar energy reaches Earth's surface and assuming you absorb 50% of the incident energy, make an order-of-magnitude estimate of the amount of solar energy you absorb in a 60-minute sunbath.