Lensmaker's Equation

picture info	Lensmaker's Equation A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements''), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses. Lenses are used in various imaging devices like telescopes, binoculars and cameras. They are also used as visual aids in glasses to correct defects of vision such as myopia and hypermetropia. History The word ''lens'' comes from '' lēns'', the Latin name of the lentil (a seed of a lentil plant) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Electron Lens Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen is most often an ultrathin section less than 100 nm thick or a suspension on a grid. An image is formed from the interaction of the electrons with the sample as the beam is transmitted through the specimen. The image is then magnified and focused onto an imaging device, such as a fluorescent screen, a layer of photographic film, or a sensor such as a scintillator attached to a charge-coupled device. Transmission electron microscopes are capable of imaging at a significantly higher resolution than light microscopes, owing to the smaller de Broglie wavelength of electrons. This enables the instrument to capture fine detail—even as small as a single column of atoms, which is thousands of times smaller than a resolvable object seen in a light microscope. Transmission electron microscopy is a major analytical method in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Lentil The lentil (''Lens culinaris'' or ''Lens esculenta'') is an edible legume. It is an annual plant known for its lens-shaped seeds. It is about tall, and the seeds grow in pods, usually with two seeds in each. As a food crop, the largest producer is Canada, producing 45% of the world’s total lentils. In cuisines of the Indian subcontinent, where lentils are a staple, split lentils (often with their hulls removed) known as dal are often cooked into a thick curry/gravy that is usually eaten with rice or '' rotis''. Botanical description Name Many different names in different parts of the world are used for the crop lentil. The first use of the word ''lens'' to designate a specific genus was in the 16th century by the botanist Tournefort. The word "lens" for the lentil is of classical Roman/Latin origin: McGee points out that a prominent Roman family took the name " Lentulus", just as the family name "Cicero" was derived from the chickpea, '' Cicer arietinum'', or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Lens (genus) ''Lens'' is a genus of flowering plant in the legume family mostly known for its edible seeds, which are referred to as lentils. ''Lens'' contains four species of small, erect or climbing herbs with pinnate leaves, small inconspicuous white flowers, and small flattened pods. The lentil most commonly eaten is the seed of ''Lens culinaris The lentil (''Lens culinaris'' or ''Lens esculenta'') is an edible legume. It is an annual plant known for its lens-shaped seeds. It is about tall, and the seeds grow in pods, usually with two seeds in each. As a food crop, the largest pro ...''. Phylogeny The genus ''Lens'' is generally divided into a few related "gene pool" groups that guide crossing. Wong et al., 2015 reports a SNP-derived phylogeny as: The non-accepted names (per ILDIS) are suffixed with their accepted counterparts. References Fabeae Fabaceae genera Taxa named by Philip Miller {{fabeae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	LSST Telescope - L1 Lens Of The Camera LSST may refer to: * Large Synoptic Survey Telescope, former name of the Vera C. Rubin Observatory astronomical observatory in Chile ** Legacy Survey of Space and Time, an astronomical survey performed at the Vera C. Rubin Observatory * Lowstand systems tract, a type of sedimentary deposit in sequence stratigraphy * The Priory Academy LSST, formerly ''Lincoln School of Science and Technology'', a school in Lincolnshire, England, UK * Legal Services Support Team, units of the United States Marine Corps Judge Advocate Division See also * * LST (other) * list (other) A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby union ... {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Optics From Roger Bacon's De Multiplicatone Specierum Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of optical instruments, instruments that use or Photodetector, detect it. Optics usually describes the behaviour of visible light, visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the Classical electromagnetism, classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of Ray (optics), rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]