Conceptual Physics (12th Edition)

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

Chapter 9 - Think and Discuss: 95


If one is 3 m from the collimated light source, the light spreads over $9 m^{2}$. At a distance of 5 m,the light covers $25 m^{2}$, and at 10 meters, the light covers $100 m^{2}$ . Please see Figure 9.5 on page 164.
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.