Types Of Questions
7 min read

Ray Optics And Optical Instruments

- Wondering what kind of questions that can be asked in next exam? Here you go!
1
2
Multiple Correct
A ray of light is incident normally on one face of a prism as shown in figure. The refractive index of the material of the prism is  and the prism is immersed in water of refractive index  then
This question has multiple correct options
A
The angle of emergence of the ray is
B
The angle of emergence of the ray is
C
The angle of emergence of the ray is
D
Total internal reflection will not occur at P if the refractive index of water increases to a value greater than by dissolving some substance
Consider an optical system placed in water PQRS is a hollow glass slab filled with air This slab is kept on the principle axis of a lens in such a way that surface PS makes an angle with the axis of the lens. , then
This question has multiple correct options
A
for transmission of light takes place through slab sin
B
for transmission of light through slab sin
C
for cm final image is at 3m distance from O
D
for cm final image is at 3m distance from O
Two parallel rays are incident on a thin lens of refractive index 1.5 as shown in figure and radius of curvature of its surfaces are 30 cm & 60 cm . Origin of coordinate axes is at the optical centre of the lens.Then
This question has multiple correct options
A
focal length of lens is 120 cm
B
light rays get reflected (TIR) from first surface of the lens
C
y-coordinate of the point at which light rays focus is -4 cm
D
y-coordinate of the point at which light rays focus is 4 cm
3
4
5
6
7
Passage Type
For two structure namely with and with and and taking the refractive index of water to be and that of air to be , the correct option(s) is (are)
A
of immersed in water is the same as that of immersed in a liquid of refractive index
B
of immersed in liquid of refractive index is the same as that of immersed in water
C
of placed in air is the same as that of immersed in liquid of refractive index
D
of placed in air is the same as that of laced in water