1.

An astronomical telescope has an agular 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

Answer»

`f_0 = 45 CM and f_e = - 9cm`
`f_0 = 7.2 cm and F _e = 5 cm`
`f _0 50 cm and f_e = 10 cm`
`f_0 = 30 cm and f_e = 6 cm`

Answer :`f_0 30 cm and f_e = 6 cm`


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