Ray Optics and Optical Instruments

Related Questions

• In an astronomical telescope, the focal lengths of two lenses are 180 cm and 6 cm respectively. In normal adjustment, the magnifying power will be

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• Image formed by a concave mirror of focal length 6 cm, is 3 times of the object, then the distance of object from mirror is

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• The figures represent three cases of a ray passing through a prism of angle A. The case corresponding to minimum deviation is

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• A tank is filled with benzene to a height of 120 mm. The apparent depth of a needle lying at a bottom of the tank is measured by a microscope to be 80 mm. The refractive index of benzene is

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• The ratio of thickness of plates of two transparent mediums A and B is 6 : 4. If light takes equal time in passing through them, then refractive index of B with respect to A will be

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