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qUESTIONS

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

A double convex lens, lens made of a material of refractive index µ₁, is placed inside two liquids or refractive indices µ₂ and µ3, as shown. μ₂> μ₁> μ3. A wide, parallel beam of light is incident on the lens from the left. The lens will give rise to

A substance is behaving as convex lens in air and concave in water, then its refractive index is

A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is

A film projector magnifies a 100 cm² film strip on a screen. If the linear magnification is 4, the area of magnified film on the screen is

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