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Magnification of Galilean Telescope #8211; (a) For relaxed eye, M<sub>∞</sub> = f<sub>0</sub>/f<sub>e</sub> In this position, length of telescope L<sub>∞</sub> = f<sub>0</sub> #8211; f<sub>e</sub> (b) When a final image is formed at least distance of distinct vision, M<sub>D</sub> = f<sub>0</sub>/f<sub>e</sub> (1 + f<sub>e</sub>/D) Length of telescope, L<sub>D</sub> = f<sub>0</sub> #8211; u<sub>e</sub>
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