A) 2.05 m
B) 1.16 m
C) 1.05 m
D) 2.9 m
Correct Answer: A
Solution :
An astronomical telescope consists of two converging lenses one is objective lens and other is eyepiece. In relaxed eye state of telescope, length of telescope tube is given by \[{{L}_{\infty }}={{f}_{0}}+{{f}_{e}}\] Given, \[{{f}_{0}}=2m,{{f}_{e}}=0.05\,m\] \[\therefore \] \[{{L}_{\infty }}=2+0.05=2.05\,m\]
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