# JEE Main & Advanced Physics Ray Optics Galilean Telescope

Galilean Telescope

Category : JEE Main & Advanced

It is also type of terrestrial telescope but of much smaller field of view.

(1) Objective is a converging lens while eye lens is diverging lens.

(2) Magnification : ${{m}_{D}}=\frac{{{f}_{0}}}{{{f}_{e}}}\left( 1-\frac{{{f}_{e}}}{D} \right)$ and ${{m}_{\infty }}=\frac{{{f}_{0}}}{{{f}_{e}}}$

(3) Length : ${{L}_{D}}={{f}_{0}}-{{u}_{e}}$ and ${{L}_{\infty }}={{f}_{0}}-{{f}_{e}}$

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