Ray Optics and Optical Instruments

Related Questions

• The length of a telescope is 36 cm. The focal lengths of its lenses can be

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• White light is passed through a prism whose angle is 5°. If the refractive indices for rays of red and blue colour are respectively 1.64 and 1.66, the angle of deviation between the two colours will be

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• The respective angles of the flint and crown glass prisms are $A’$ and $A$. They are to be used for dispersion without deviation, then the ratio of their angles $A’ /A$ will be

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• Given a point source of light, which of the following can produce a parallel beam of light

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• If the refractive indices of crown glass for red, yellow and violet colours are 1.5140, 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive powers for crown and flint glass are respectively

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