Light
Definition
Light or visible light is electromagnetic radiation that is visible to the human eye,and is responsible for the sense of sight.
Main topic
Lenses
Properties of light
SpeedOfLightInVacuum
3x10^8 m/s
Light travels in a straight line.
Refraction
Light travels at different speeds in different optical mediums.
As light travels from one optical medium to another,there will be a sudden change
It causes the path of light to bend at the boundary of the two optical medium.
This is also known as Refraction.