The main religions of light are highlighted below - light travels in a straight path through a transparent equilibrium. Light travels at a certain speed through a certain medium. The value of this velocity in space , c = 3 10 ৮ ms − 1 is the reflection , refraction , perturbation , diffraction , scattering and covariance of light. Light is a kind of energy. Light is a type of electromagnetic wave. In some cases the light behaves like a wave , and sometimes like a light particle.