Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 34 - Images - Problems: 19b

Answer

$f=-20cm$

Work Step by Step

Using the relation that $$f=\frac{r}{2}$$ and substituting the value of $r=-40cm$ yields $$f=\frac{-40cm}{2}=-20cm$$
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