Ray Optics and Optical Instruments

Related Questions

• A lens is placed between a source of light and a wall. It forms images of area ${{A}_{1}}$ and ${{A}_{2}}$ on the wall for its two different positions. The area of the source or light is

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• Two convex lenses of focal lengths 0.3 m and 0.05 m are used to make a telescope. The distance kept between the two is

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• Light rays from a source are incident on a glass prism of index of refraction $\mu $ and angle of prism $\alpha $. At near normal incidence, the angle of deviation of the emerging rays is

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• A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a

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• If the refractive angles of two prisms made of crown glass are $10^o$ and $20^o$ respectively, then the ratio of their colour deviation powers will be

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