A) 106 cm
B) 102 cm
C) 92 cm
D) 78 cm
Correct Answer: B
Solution :
\[M=-\frac{{{f}_{o}}}{{{f}_{e}}},\]where\[{{f}_{o}}\]is focal length of object and\[{{f}_{e}}\]is focal length of eyepiecs \[{{f}_{e}}=\frac{{{f}_{o}}}{|M|}=\frac{100}{50}=2\,cm\] Length of the telescope \[={{f}_{1}}={{f}_{e}}=100+2=102\,cm\]You need to login to perform this action.
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