352
CHAPTER 25
(c) The angular magnification is
3.00
o
e
f
m
f
==
, giving
3.00
o
f
=
e
f
. Also, the length of the telescope is
3.00
10.0 cm
oe
e e
Lf f
f f
=+=
− =
,
giving
10.0 cm
5.00 cm
2.00
ee
ff
=−
= −
and
3.00
15.0 cm
25.31
The lens for the left eye forms an upright, virtual image at
50.0 cm
L
q
= −
when the
object distance is
, so the thin lens equation gives its focal length as
25.0 cm
L
p
=
()
( )
25.0 cm
25.0 cm
LL
R
q
50.0 cm
50.0 cm
50.0 cm
L
pq
f
−
=
+−
100 cm
Similarly for the other lens,
= −
R
p
when
25.0 cm
=
, and
.
33.
R
f
=
3 cm
(a) Using the lens for the left eye as the objective,
50.0 cm
1.50
33.3 cm
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This document was uploaded on 10/20/2011.
 Spring '09
 Physics, Work

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