300
CHAPTER 23
(b) When
q
, we find
3
= −
f
(
)
3
3
3
4
f
f
f
p
f
f
−
=
=
−
−
(c) In case (a),
4
3
4
3
q
f
M
p
f
= −
= −
= −
and in case (b),
3
4
3
4
q
f
M
p
f
−
= −
= −
= +
23.61
If
R
and
, the focal length is given by
1
3.00 m
= −
2
6.00 m
R
= −
1
1
2
2
1
1
.00 m
6.00 m
n
n
n
−
−
=
−
=
2
1
n
1
1
3.00 m
6
+
−
f
n
(
or
)
2
n
2
1
m
n
n
−
6.00
f
=
(1)
(a) If
1.5
n
=
and
, then
1
0
2
1.00
n
=
(
)(
)
6.00 m
1.00
12.0 m
1.00
1.50
f
=
= −
−
The thin lens equation gives
(
)
(
)
10.0 m
12.0 m
10.0 m
12.0 m
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- Fall '10
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- Physics, 0 m, 3.00 m, Thin lens
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