Optical concept progressed while in the mid-17th century with treatises created by philosopher René Descartes, which discussed a range of optical phenomena like reflection and refraction by assuming that light was emitted by objects which created it.[26] This differed substantively from the ancient Greek emission concept. Inside the late 1660s https://opticiansnearme29517.like-blogs.com/29756269/bookshelf-speakers-fundamentals-explained