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 \[{{L}_{\infty }}={{f}_{o}}+{{f}_{e}}\] Given, \[{{f}_{o}}=2\,\,m,\,\,{{f}_{e}}=0.05\,\,m\] \[\therefore \] \[{{L}_{\infty }}=2=0.05=2.05\,\,m\]
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