College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 25 - Vision and Optical Instruments - Learning Path Questions and Exercises - Exercises - Page 873: 39

Answer

a). $-4.0X$ b). $75cm$

Work Step by Step

$fo=60cm$ $fe=15cm$ a). Magnifying power = $m=-\frac{fo}{fe}=-\frac{60}{15}=-4X$ b). Length of the telescope = L = $fo+fe=60+15=75cm$
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