Ray Optics and Optical Instruments

Related Questions

• 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 Gallilean telescope, the final image formed is

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• The aperture of the objective lens of a telescope is made large so as to

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• A plano-convex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of the size of the object

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• A thin lens focal length ${{f}_{1}}$ and its aperture has diameter d. It forms an image of intensity I. Now the central part of the aperture upto diameter $\frac{d}{2}$ is blocked by an opaque paper. The focal length and image intensity will change to

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