Answer
$+6.0D$
Work Step by Step
Magnification of a magnifying glass when used by relaxed eye is $1.5X$.
To determine power of the lens :-
$m=\frac{25}{f}$
$f=\frac{25}{m}=\frac{25}{1.5}=16.67cm=0.16m$
Thus, $P=\frac{1}{0.16}\approx+6.0D$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
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 872: 27
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