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Question
Physics
For a telescope having fo as the focal length of the objective and fe as the focal length of the eyepiece, the length of the telescope tube is
Q. For a telescope having
f
o
as the focal length of the objective and
f
e
as the focal length of the eyepiece, the length of the telescope tube is
2151
234
Delhi UMET/DPMT
Delhi UMET/DPMT 2011
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A
f
e
B
f
o
−
f
e
C
f
o
D
f
o
+
f
e
Solution:
Given
f
o
=
f
o
and
u
e
=
f
o
We know for length of the telescope tube
L
=
f
o
+
u
o
L
=
f
o
+
f
e