Like the sun light bulbs and candles
Light
The place which light originates
Light source
The trajectory that light takes as it travels
Light path
A beam of light
Rays
A substance that moves energy light or sound waves from one place to another
Medium
The bending of light or other waves when they pass from one transparent substance from another
Refraction
The return of light or sound waves from a surface
Reflection
The process of taking in something
Absorption