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292
CHAPTER 23
23.47
Since
q
=+
when
, we find that
8.00 cm
10.0 cm
p
1
1
1
fpq
=+=
20.0
p
=
1
18.0
10.0 cm
80.0 cm
cm
1
8.00 cm
+
=
Then, when
,
1
1
1
qfp
18.0
80.0 c
1
m
20.0 cm
18.0
4.00
14.0
80.0 cm
80.0 cm
−
=−=
−
=
=
or
80.0 cm
14.0
==
5.71 cm
+
q
Thus, a
real image is formed
5.71 cm in front of the mirror
23.48
Applying the thin lens equation to the first lens gives
( )( )
()
11
1
12 cm
6.0 cm
4.0 cm
12 cm
6.0 cm
pf
q
−
=
−
−−
−
The virtual image formed by the first lens serves as the object for the second lens. If the
image formed by that converging lens is to be located at infinity, the image formed by
the diverging lens must be located at the focal point in front of the converging lens.
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This document was uploaded on 10/20/2011.
 Spring '09
 Physics, Work

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