Ray Optics and Optical Instruments

Related Questions

• A camera objective has an aperture diameter d. If the aperture is reduced to diameter $d/2,$ the exposure time under identical conditions of light should be made

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• A person's near point is 50 cm and his far point is 3 m. Power of the lenses he requires for (i) reading and (ii) for seeing distant stars are

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• What is the time taken (in seconds) to cross a glass of thickness $4 mm$ and $\mu $= 3 by light

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• Band spectrum is produced by

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• A vessel of depth 2d cm is half filled with a liquid of refractive index ${{\mu }_{1}}$ and the upper half with a liquid of refractive index ${{\mu }_{2}}$. The apparent depth of the vessel seen perpendicularly is

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