Christiaan Huygens (1629-1695) worked out a mathematical wave principle of light in 1678, and published it in his Treatise on light in 1690. He proposed that light was emitted in all directions for a number of waves inside a medium known as the Luminiferous ether. As waves are not https://tysonpziry.blogozz.com/38010668/a-secret-weapon-for-light-steel-villa