Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 22 - Electromagnetic Waves - Problems - Page 641: 29

Answer

$3.80\times10^{26}W$

Work Step by Step

Assume that the sun radiates uniformly. Imagine a sphere, centered at the Sun, whose radius equals the Earth’s orbital radius. The $1350 W/m^2$ is the average intensity. This is equal to the sun’s total power, distributed over the surface of the imaginary sphere. $$I=\frac{P}{A}$$ $$P=IA=(1350\frac{W}{m^2})4\pi(1.496\times10^{11}m)^2$$ $$=3.80\times10^{26}W$$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.