Ray Optics and Optical Instruments

Related Questions

• A student can distinctly see the object upto a distance 15 cm. He wants to see the black board at a distance of 3 m. Focal length and power of lens used respectively will be

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• A ray of light is incident on a transparent glass slab of refractive index 1.62. The reflected and the refracted rays are mutually perpendicular. The angle of incidence is

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• In the figure, an air lens of radii of curvature 10 cm (${{R}_{1}}$ = ${{R}_{2}}$ = 10 cm) is cut in a cylinder of glass$(\mu =1.5)$. The focal length and the nature of the lens is

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• The phenomenon utilised in an optical fibre is

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• A plane convex lens is made of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is

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