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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The focal length of objective and eye lens of a astronomical telescope are respectively 2m and 5cm . Final image is formed at (i) least distance of distinct vision (ii) infinity. The magnifying power in both cases will be

The focal length of objective and eye lens of a astronomical telescope are respectively 2m and 5cm . Final image is formed at (i) least distance of distinct vision (ii) infinity. The magnifying power in both cases will be

A simple telescope The light ray is incidence at angle of 60∘ on a prism of angle 45∘ . When the light ray falls on the other surface at 90∘ the refractive index of the material of prismμ and the angle of devaition δ are given by