Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 31 - Electromagnetic Fields and Waves - Exercises and Problems - Page 903: 44


(a) $P = 3.85\times 10^{26}~W$ (b) $I = 589~W/m^2$

Work Step by Step

(a) We can find the power output of the sun: $I = \frac{P}{4\pi~d^2}$ $P = 4\pi~d^2~I$ $P = (4\pi)~(1.5\times 10^{11}~m)^2~(1360~W/m^2)$ $P = 3.85\times 10^{26}~W$ (b) We can find the intensity of sunlight on Mars: $I = \frac{P}{4\pi~d^2}$ $I = \frac{3.85\times 10^{26}~W}{(4\pi)~(2.28\times 10^{11}~m)^2}$ $I = 589~W/m^2$
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