Ray Optics and Optical Instruments

Question: The length of an astronomical telescope for normal vision (relaxed eye) ($f_o$ = focal length of objective lens and $f_e$ = focal length of eye lens) is

1) ${{f}_{o}}\times {{f}_{e}}$

2) $\frac{{{f}_{o}}}{{{f}_{e}}}$

3) ${{f}_{o}}+{{f}_{e}}$

4) ${{f}_{o}}-{{f}_{e}}$

Solution:

Explanation: No Explanation

Microscope and Telescope

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