Question

The speed of light will be minimum while passing through
1.glass
2.vacuum
3.water
4.air

Answer 1

The speed of light will be minimum while passing through glass

Answer 2

Option 1 is correct: The speed of light will be minimum while passing through glass.

• We all know that the speed of light is not same for all mediums, it keeps on changing from one medium to the other.
• The speed of light decreases if more particles block its way.
• In vacuum, no particle block the path of light, hence it's speed is the highest there.
• While in glass, there are a lot of particles blocking the path of light, hence the speed of light is very less there.