Christiaan Huygens (1629-1695) worked out a mathematical wave principle of light in 1678, and printed it in his Treatise on light in 1690. He proposed that light was emitted in all Instructions being a series of waves in a very medium called the Luminiferous ether. As waves are not https://lgshouse32109.topbloghub.com/45533823/indicators-on-prefab-office-building-you-should-know