1.
A thin lens is made of glass of refractive index 1.6 both the surfaces of lens are convex. When this lens is dipped in water of refractive index 4/3 then the lens will behave like
2.
When we do calculation for image location from spherical mirrors then normally we consider paraxial rays only, because paraxial rays
3.
Which of the following depend on whether rays are paraxial or not for spherical mirrors?
4.
A medium of refractive index u is separated from air using a plane surface. When light ray is incident on this medium at an angle 70° then it is found that refracted and reflected ray suffer equal deviations is opposite directions. What is refractive index of material?
5.
There is a sphere of radius R and refractive index μ. At what distance from the surface of sphere should an object be placed so that real image is formed at the same distance from the sphere?
6.
Image formed by a convex mirror
7.
A point source of light is kept on the surface of a sphere and it is found that parallel light rays emerge from the other side of the sphere. What is refractive index of material of the sphere?
8.
An object is kept at a distance 20 cm from a convex mirror of focal length 20 cm. The image will form at
9.
Find the focal length of plano-convex lens of material having refractive index of 1.5 Radius of curvature of convex surface is 10 cm.
10.
Total internal reflection may be observed if
11.
Convex lens forms a real image I, of a point object, on its principal axis. Rectangular glass slab of thickness t is placed between the lens and I. Refractive index of material of glass slab is u. After the introduction of slab, point I will move
12.
Plane mirror may form areal image at finite distance from it,
13.
Read the question given below
14.
Screen is placed at a distance 60 cm from an object. A convex lens of focal length f is placed between object. And screen and it is attempted that real image of object is formed on the screen. But real image could not be formed for any position of lens between object and screen.
15.
Consider a situation when light ray is travelling from optically denser medium to rarer medium. Critical angle for this pair of mediums is θ. What is the maximum possible angle of deviation suffered by light ray?
16.
When light rays are incident on a thick transparent slab then these rays are partly reflected and partly refracted into the slab. At a certain angle of incidence θ, it is found that reflected and refracted rays are mutually perpendicular. What is refractive index of material?
17.
Read the question given below
18.
The image formed by a convex lens
19.
A piece of glass is not visible in a colourless transparent liquid. It possible because
20.
There is an air bubble inside water. At what distance from the bubble should an object be placed so that real image is formed at the same distance from bubble ? Refractive index of water is 4/3.
