Answer
$-25$
Work Step by Step
We can find the required magnification as
$M_{total}=\frac{d_i N}{f_{objective}f_{eyepiece}}$
We plug in the known values to obtain:
$M_{total}=-\frac{(12)(25)}{(2.2)(5.4)}=-25$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 27 - Optical Instruments - Problems and Conceptual Exercises - Page 971: 58
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