question_answer

If Fo and Fe are the focal length of the objective and eye-piece respectively of a telescope, then its magnifying power will be CPMT 1977, 82, 97, 99, 2003;  SCRA 1994; KCET 1999; Pb. PMT 2000; BHU 2001;  DCE 2002; RPMT 2003; BCECE 2003, 04]

A)            \[{{F}_{o}}+{{F}_{e}}\]     

B)            \[{{F}_{o}}\times {{F}_{e}}\] 

C)            \[{{F}_{o}}/{{F}_{e}}\]     

D)            \[\frac{1}{2}({{F}_{o}}+{{F}_{e}})\]