Christiaan Huygens (1629-1695) worked out a mathematical wave principle of light in 1678, and posted it in his Treatise on light in 1690. He proposed that light was emitted in all directions to be a series of waves in a very medium called the Luminiferous ether. As waves are https://lightgaugesteelvilla09775.blogozz.com/37843326/new-mobile-homes-an-overview