Search results
Results from the WOW.Com Content Network
History of optics. Modern ophthalmic lens making machine. 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 ...
The left wedjat eye, symbolizing the Eye of Horus. The Eye of Horus, also known as left wedjat eye or udjat eye, specular to the Eye of Ra (right wedjat eye), is a concept and symbol in ancient Egyptian religion that represents well-being, healing, and protection. It derives from the mythical conflict between the god Horus with his rival Set ...
Wadjet (/ ˈwædʒət /; Ancient Egyptian: wꜢḏyt "Green One"), [ 1 ] known to the Greek world as Uto (/ ˈjuːtoʊ /; Koinē Greek: Οὐτώ) or Buto (/ ˈbjuːtoʊ /; Βουτώ) among other renderings including Wedjat, Uadjet, and Udjo, [ 2 ] was originally the ancient Egyptian local goddess of the city of Dep or Buto in Lower Egypt ...
Alhazen's most famous work is his seven-volume treatise on optics Kitab al-Manazir (Book of Optics), written from 1011 to 1021. [48] In it, Ibn al-Haytham was the first to explain that vision occurs when light reflects from an object and then passes to one's eyes, [ 14 ] and to argue that vision occurs in the brain, pointing to observations ...
The Book of Optics (Arabic: كتاب المناظر, romanized: Kitāb al-Manāẓir; Latin: De Aspectibus or Perspectiva; Italian: Deli Aspecti) is a seven-volume treatise on optics and other fields of study composed by the medieval Arab scholar Ibn al-Haytham, known in the West as Alhazen or Alhacen (965–c. 1040 AD).
The Tyndall effect is light scattering by particles in a colloid such as a very fine suspension (a sol). Also known as Tyndall scattering, it is similar to Rayleigh scattering, in that the intensity of the scattered light is inversely proportional to the fourth power of the wavelength, so blue light is scattered much more strongly than red light.
The Eye of Ra can be equated with the disk of the sun, with the cobras coiled around the disk, and with the white and red crowns of Upper and Lower Egypt. The right wedjat -eye, symbolizing the Eye of Ra. The Eye of Ra or Eye of Re, usually depicted as sun disk or right wedjat-eye (paired with the Eye of Horus, left wedjat -eye), is an entity ...
Egyptian blue, also known as calcium copper silicate (CaCuSi 4 O 10 or CaOCuO (SiO 2) 4 (calcium copper tetrasilicate)) or cuprorivaite, [1] is a pigment that was used in ancient Egypt for thousands of years. It is considered to be the first synthetic pigment. [2] It was known to the Romans by the name caeruleum.