Answer
$37cm$
Work Step by Step
We can find the focal length as
$f=\frac{1}{refractive \space power}$
We plug in the known values to obtain:
$f=\frac{1}{+2.7diopters}$
$f=0.037m=37cm$
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 970: 22
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