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Optical Instruments
347
(b) With the image at the normal near point, the angular magnification is
max
25.0 cm
25.0 cm
1
1
7.14
4.07 cm
mm
f
==
+
=
+
=
+
25.20
(a) For maximum magnification, the image should be at the normal near point
( )
25.0 cm
q
=−
of the eye. Then, from the thin lens equation,
( )( )
25.0 cm
5.00 cm
4.17 cm
25.0 cm
5.00 cm
qf
p
qf
−
=
+
−−
−
(b) The magnification is
25.0 cm
25.0 cm
11
5.00 cm
m
f
=+
6
.
0
0
25.21
(a) From the thin lens equation, a real inverted image is formed at an image distance of
( )( )
71.0 cm
39.0 cm
86.5 cm
71.0 cm
39.0 cm
pf
q
pf
=
+
so the lateral magnification produced by the lens is
86.5 cm
1.22
71.0 cm
q
h
M
hp
′
−=
−
=
−
and the magnitude is
1.22
M
=
(b) If
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This document was uploaded on 10/20/2011.
 Spring '09
 Physics, Work

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