This article briefly Explain Characteristics of Light. Newton explain the particle theory of light to spell out the bending of light upon reflection from a mirror or upon refraction when passing from air into water. In his explain, light is a flow of particles emitted from a light source, entering the eye to stimulate sight. Newton’s contemporary Huygens showed a wave theory of light could explain the laws and regulations of reflection and refraction. Here also discuss on Electromagnetic spectrum, Speed of light and Polarization.