Optical principle progressed during the mid-seventeenth century with treatises published by philosopher René Descartes, which defined various optical phenomena which include reflection and refraction by assuming that light was emitted by objects which developed it.[26] This differed substantively from the ancient Greek emission idea. From the late 1660s and early https://brookschidy.newsbloger.com/30429896/how-much-you-need-to-expect-you-ll-pay-for-a-good-prescription-reading-glasses