Refraction and Refractive Index

At what angle of incidence, does the light pass from the rarer to the denser medium without any deviation?

When light passes from a denser medium to a rarer medium, the speed of light

• increases

• remains the same

• becomes zero

• decreases

What is the speed of light in vaccum?

What is the unit of refractive index?

• meters

• seconds

• no units

• meters per second

Which of the sollowing symbols are used to represent the refractive index of the medium 2 with respect to medium 1.

Speed of light in a material is 2.5 x 10^8 m/s. Find the refractive index of the material.

• 1.5
• 1.8
• 2.0
• 1.2