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When light of wavelength is incident on an equilateral prism kept in its minimum deviation position, it is found that the angle of deviation equals the angle of the prism itself. The refractive index of the material of the prism for the wavelength A is, then

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is

The angle of minimum deviation measured with a prism is 30° and the angle of prism is 60°. The refractive index of prism material is

The angle of minimum deviation for a prism is 40° and the angle of the prism is 60°. The angle of incidence in this position will be

The refractive index of a prism for a monochromatic wave is √2 and its refracting angle is 60°. For minimum deviation, the angle of incidence will be

A plano – convex lens made of material of refractive index μ with radius of curvature R is silvered on the curved side. How far away from the lens-mirror must you place a object so that the image coincides with the object

A plano-convex lens when silvered in the plane side behaves like a concave mirror of focal length 30 cm. However, when silvered on the convex side it behaves like a concave mirror of focal length 10 cm. Then the refractive index of its material will be

A thin equiconvex lens is made of glass of refractive index 1.5 and its focal length is 0.2 m, if it acts as a concave lens of 0.5m focal length when dipped in a liquid, the refractive index of the liquid is

In the figure, an air lens of radii of curvature 10cm(R1 = R2= 10cm) is cut in a cylinder of glass (µ = 1.5). The focal length and the nature of the lens is

The radius of curvature of the curved surface of a plano- convex lens is 20 cm. If the refractive index of the material of the lens be 1.5, it will

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