Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 26 - Geometrical Optics - Problems and Conceptual Exercises - Page 940: 23

Answer

$\frac{R}{2}$

Work Step by Step

We know that the greatest image distance occurs when the object is infinitely far from the mirror. Thus, when the image is at the focal point, the greatest distance at which the image is formed behind the mirror is $f=\frac{R}{2}$.
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