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Optics began with the development of lenses by the ancient Egyptians and Mesopotamians, followed by theories on light and vision developed by ancient Greek philosophers, and the development of geometrical optics in the Greco-Roman world. The word optics is derived from the Greek term τα ὀπτικά … See more In ancient India, the philosophical schools of Samkhya and Vaisheshika, from around the 6th–5th century BC, developed theories on light. According to the Samkhya school, light is one of the five fundamental … See more Al-Kindi (c. 801–873) was one of the earliest important optical writers in the Islamic world. In a work known in the west as De radiis stellarum, al-Kindi developed a theory "that everything in the world ... emits rays in every direction, which fill the whole world." See more Johannes Kepler (1571–1630) picked up the investigation of the laws of optics from his lunar essay of 1600. Both lunar and solar eclipses presented … See more • Timeline of electromagnetism and classical optics • History of electromagnetism • History of physics • List of astronomical instrument makers See more The English bishop Robert Grosseteste (c. 1175–1253) wrote on a wide range of scientific topics at the time of the origin of the medieval university and the recovery of the works of … See more There is disputed archeological evidence of use of lenses in antiquity, spanning several millennia. It has been suggested that glass eye covers in hieroglyphs from the See more Light is made up of particles called photons and hence inherently is quantized. Quantum optics is the study of the nature and effects of light as quantized photons. The first indication … See more WebThe William Optics RedCat 71 is a 71mm f/4.9 refractor with a Petzval design that comprises a doublet front group with FPL-53 glass element, plus a single central element … 卵 ペースト