Ray Optics Test...

For a prism of refractive index 1.732, the angle of minimum deviation is equal to the angle of prism. Then, the angle of the prism is

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

When the light enters from air to glass, for which colour the angle of deviation is maximum?

A thin lens of glass (μ = 1.5) of focal length +10 cm is immersed in water (μ =1.33). The new focal length is

The refractive index of a material of a planoconcave lens is 5/3, the radius of curvature is 03 m. The focal length of the lens in air is

A convex and a concave lens separated by distance d are then put in contact. The focal length of the combination

Two lenses of power –15 D and + 5 D are in contact with each other. The focal length of the combination is

Two thin equiconvex lenses each of focal length 0.2 m are placed coaxially with their optic centres 0.5 m apart. Then, the focal length of the combination is

Two thin lenses of focal length 20 cm and 25 cm are in contact. The effective power of the combination is

The plano-convex lens of focal length 20 cm and 30 cm are placed together to form a double convex lens. The final focal length will be