Ray Optics and Optical Instruments

Related Questions

• The radius of the convex surface of plano-convex lens is 20 cm and the refractive index of the material of the lens is 1.5. The focal length of the lens is

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• A white screen illuminated by green and red light appears to be

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• If ${{\varepsilon }_{0}}$ and ${{\mu }_{0}}$ are respectively, the electric permittivity and the magnetic permeability of free space, $\varepsilon $ and $\mu $ the corresponding quantities in a medium, the refractive index of the medium is

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• A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eye-piece of focal length 2 cm

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• A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will

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