Light is a very special type of energy. for example the sun's light gives us heat and life.
Light waves travel in a strait line in mediums, but when light hits matter it reflects.
Reflection is when light hits matter and bounces off.There is also refraction which is when light hits matter and changes direction. Lastly there is absorption. Absorption is when light hits matter and the light absorbs into the matter.
As I previously said, the sun gives us important heat and light. Here I'll show you.
See? Without the sun's light I can't see well. Without the sun's heat I'm freezing.
Light energy doesn't just help humans. It makes these flowers bloom beautifully.