Ray Optics Test...

The angle of a prism is 42° and refractive index of its material is 3/2. Then, angle of minimum deviation for this prism is

Object is placed at a distance 10 cm from a convex mirror of focal length 20 cm. Image distance is

The image of an electric bulb fixed in a wall is to be obtained on the wall opposite to it at a distance of 3 m. The maximum possible focal length of the convex lens is

When monochromatic red light is used instead of blue light in a convex lens. its focal length will

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

A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?

A plano-concave lens is made of glass of refractive index 1.5 and the radius of curvature of its curved face is 100 cm. What is the power of the lens?

A thin convex lens of crown glass having refractive index 1.5 has power 1 D. What will be the power of similar convex lens refractive index 1.6?

A convex lens made of glass has focal length 0.15 m in air. If the refractive index of glass is 3/2 and that of water is 4/3, the focal length of lens when immersed in water is

60° prism has μ = √2 . Angle of incidence for minimum deviation is