In an astronomical telescope in normal adjustment a straight black line of length `L` is drawn on inside part of objective lens.

In an astronomical telescope in normal adjustment a straight black line of length `L` is drawn on inside part of objective lens. The eye piece forms a real image of this line. The length of this image is `I`. The magnification of the telescope is
A. `L/l`
B. `L/l+1`
C. `L/l-1`
D. `(L+1)/(L-l)`

In an astronomical telescope in normal adjustment a straight black line of length `L` is drawn on inside part of objective lens. The eye piece forms a

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