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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• Consider telecommunication through optical fibres. Which of the following statements is not true

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• A convex lens has 9 cm focal length and a concave lens has – 18 cm focal length. The focal length of the combination in contact will be

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• In the adjoining diagram, a wavefront AB, moving in air is incident on a plane glass surface XY. Its position CD after refraction through a glass slab is shown also along with the normals drawn at A and D. The refractive index of glass with respect to air ($\mu =1$) will be equal to

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• An electron microscope is superior to an optical microscope in

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