Ray Optics and Optical Instruments

Related Questions

• It is desired to photograph the image of an object placed at a distance of $3m$ from the plane mirror. The camera which is at a distance of $4.5m$ from the mirror should be focussed for a distance of

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• The wavelength of emission line spectrum and absorption line spectrum of a substance are related as

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• A mark at the bottom of a liquid appears to rise by 0.1 m. The depth of the liquid is 1 m. The refractive index of the liquid is

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• Focal length of a convex lens will be maximum for

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• A plano convex lens $(f=20cm)$is silvered at plane surface. Now $f$ will be

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