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298
CHAPTER 23
(a) If
f
=−
, then
2
20.0 cm
2
20.0 cm
q
=+
and the magnification by the second lens is
()
( )
22
2
20.0 c
2.00
Mq
p
m
10.0 cm
−
The final image is located
20.0 cm to the right of the second lens
and the overall magnification is
( )
12
MMM
==
3.00
2.00
6.00
−+
=
−
(b) Since
0
M
<
, the final image is
inverted
(c) If
f
, then
2
20.0 cm
2
6.67 cm
q
and
2
2
0.667
q
p
−
2
M
=
6.67 cm
10.0 cm
The final image is
6.67 cm to the right of the second lens
and the overall magnification is
( )
3.00
0.667
2.00
−+=
−
Since
0
M
<
, the final image is
23.58
The object is located at the focal point of the upper
mirror. Thus, the upper mirror creates an image at
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This document was uploaded on 10/20/2011.
 Spring '09
 Physics, Work

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