JEE Main 2014 Physics question
The focal lengths of objective lens and eye lens of a Galilean Telescope are respectively 30 cm and 3.0 cm. Telescope produces virtual, erect image of an object situated far away from it at least distance of distinct vision from the eye lens. In this condition the Magnifying Power of the Galilean Telescope should be :
Answer: (3)
Solution
With the final image at the near point D = 25 cm, the standard near-point formula gives \frac{f_0}{f_e}\frac{f_e}{D}$) =
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