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 - Page 1039: 24b

Answer

The focal length (f) = +20 cm.

Work Step by Step

The image distance is given by $i = -mp = -(-1/2)(60) = 30 cm$ By substituting i = +30 cm and p = +60 cm into the focal length equation, we obtain: $1/f = 1/p + 1/i = 1/60 + 1/30\\\\ f = +20 cm $
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