Ray Optics and Optical Instruments

Related Questions

• A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of 45°. The ray undergoes total internal reflection. If n is the refractive index of the medium with respect to air, select the possible value (s) of n from the following

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• If ${{\mu }_{_{0}}}$ be the relative permeability and ${{K}_{0}}$ the dielectric constant of a medium, its refractive index is given by

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• In human eye the focussing is done by [CPMT 1983]

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• A terrestrial telescope is made by introducing an erecting lens of focal length $f$ between the objective and eye piece lenses of an astronomical telescope. This causes the length of the telescope tube to increase by an amount equal to

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• A diver at a depth of $12m$ in water ($\mu =4/3)$sees the sky in a cone of semi-vertical angle

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