1.
A prism has a refracting angle of 60°. When a light ray is incident at 50°, then minimum deviation is obtained. The angle of minimum deviation is-
4.
A ray of monochromatic light propagating in air is incident on the surface of water. Which of the following will be same for the reflected and refracted rays?
5.
A ray of light travels a distance of 12 m in a transparent sheet in 60 ns. The refractive index of the sheet is-
7.
A biconcave lens of power P vertically splits into two identical planoconcave parts. The power of each part will be-
8.
A planoconvex lens is made of a material of refractive index 1.6. If the radius of curvature of the curved surface is 60 cm, then focal length of the lens is-