Questions
Find the length of a telescope for which it is known that it has an objective lens of focal length 144 cm and an eye piece of focal length 6 cm.
a
0.75 m
b
1.38 m
c
1.0 m
d
1.5 m
detailed solution
Correct option is D
The separation between the objective and the eye piece = Length of the telescope, tube f = f0 + fe Here, f0=144 cm=1.44m, fe=6.0 cm = 0.06 m∴f=1.44+0.06=1.5mTalk to our academic expert!
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