Categories > Ray Optics and Optical Instruments > Microscope and Telescope > An astronomical telescope has an angular magnification of magnitude 5 for distant objects. The separation between the objective and the eye piece is 36 cm and the final image is formed at infinity. The focal length $f_o$ of the objective and the focal length $f_e$ of the eye piece are

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Question: An astronomical telescope has an angular magnification of magnitude 5 for distant objects. The separation between the objective and the eye piece is 36 cm and the final image is formed at infinity. The focal length $f_o$ of the objective and the focal length $f_e$ of the eye piece are


1) $f_o$ = 45 cm and $f_e$ = – 9 cm
2) $f_o$ = 7.2 cm and $f_e$ = 5 cm
3) $f_o$ = 50 cm and $f_e$ = 10 cm
4) $f_o$ = 30 cm and $f_e$ = 6 cm
Solution: Explanation: No Explanation
Microscope and Telescope

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