A) \[\frac{1}{2}({{f}_{o}}+{{f}_{e}})\]
B) \[{{f}_{o}}/{{f}_{e}}\]
C) \[({{f}_{o}}+{{f}_{e}})\]
D) \[{{f}_{o}}\times {{f}_{e}}\]
Correct Answer: B
Solution :
Magnification of telescope is given by \[M=\frac{{{f}_{o}}}{{{u}_{e}}}\] where \[{{u}_{e}}\] is first image distance from eyepiece. For relaxed eye, intermediate image should lie at first focus of eyepiece or \[{{u}_{e}}={{f}_{e}}\] \[\therefore \] \[M=\frac{{{f}_{o}}}{{{f}_{e}}}\]
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