Refraction of Light Quiz

1. What phenomenon occurs when light passes from one medium to another?

A) Reflection
B) Refraction
C) Dispersion
D) Diffraction

2. What is the refractive index of a medium?

A) The ratio of the speed of light in vacuum to the speed of light in the medium
B) The angle of incidence
C) The speed of sound in the medium
D) The density of the medium

3. When light travels from air to water, what happens to its speed?

A) It increases
B) It decreases
C) It remains constant
D) It doubles

4. What is total internal reflection?

A) Light is completely absorbed by the medium
B) Light is reflected back into the medium when the angle of incidence is greater than the critical angle
C) Light is refracted at the boundary
D) Light passes through without any change

5. Which instrument uses the principle of refraction?

A) Microscope
B) Telescope
C) Both A and B
D) None of the above

6. What effect does a prism have on white light?

A) Reflection
B) Dispersion
C) Absorption
D) Transmission

7. What is the critical angle in refraction?

A) The angle at which light bends the most
B) The angle of incidence where refraction ceases and total internal reflection begins
C) The angle of incidence equal to the angle of refraction
D) None of the above

8. When light enters a denser medium, it bends...

A) Away from the normal
B) Towards the normal
C) In a straight line
D) At a 90-degree angle

9. What is the effect of temperature on the refractive index of a medium?

A) It has no effect
B) The refractive index increases with temperature
C) The refractive index decreases with temperature
D) The refractive index fluctuates randomly

10. A lens that converges light rays is called...

A) Diverging lens
B) Converging lens
C) Plano-convex lens
D) Meniscus lens