Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 9 - Think and Discuss: 94


Please see Figure 9.5 on page 164. Intensity scales as the inverse square of the distance. For a planet half as far as Earth is from the sun, the light intensity would be four times greater than it is on Earth. For a planet ten times farther away than Earth is now, approximately the location of Saturn, the light intensity would be 1/100 as much as it is on Earth.
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