How Light Works - How It Works

Light, is the smallest quantity of energy that can be transported. A photon, an elementary particle without a real size. That can't be split, only created or destroyed.

When we say light, we actually mean visible light which is a tiny part of the electromagnetic spectrum: energy in form of electromagnetic radiation. 

Electromagnetic radiation consist of an enormous range of wavelengths and frequencies. Gamma rays have the smallest wave lengths because they are the highest energy photons. Visible light is in the middle of the spectrum and on the other end of the spectrum are radio waves.