Ray Optics and Optical Instruments

Related Questions

• When light travels from air to water and from water to glass, again from glass to $C{{O}_{2}}$ gas and finally through air. The relation between their refractive indices will be given by

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• An eye specialist prescribes spectacles having a combination of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in diopters is

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• A concave mirror of focal length $f$ (in air) is immersed in water ($\mu = 4/3$). The focal length of the mirror in water will be

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• The focal length of a combination of lenses formed with lenses having powers of + 2.50 D and – 3.75 D will be

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• The spectrum obtained from a sodium vapour lamp is an example of

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