Answer
37.6 cm
Work Step by Step
The rays from the sun are parallel because it is so far away. The image is at the focal point. The focal length is half the radius of curvature.
$r=2f=2(18.8cm)=37.6 cm$
Physics: Principles with Applications (7th Edition)
by Giancoli, Douglas C.
Published by
Pearson
ISBN 10:
0-32162-592-7
ISBN 13:
978-0-32162-592-2
Chapter 23 - Light: Geometric Optics - Problems - Page 674: 8
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