optics

Located in Rochester, New York, USA and founded in 1850, the University of Rochester is a private, coeducational and nonsectarian research institution. A member of the Association of American Universities, Rochester offers degree programs at the bachelor's, master's, and doctoral levels, as well as in several professional disciplines. The University's current president is Joel Seligman, who replaced Thomas H. Jackson as the University's 10th president on July 1, 2005. The university is one of 60 elected me ...

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Crystal optics is the branch of optics that describes the behaviour of light in anisotropic media, that is, media (such as crystals) in which light behaves differently depending on which direction the light is propagating. Crystals are often naturally anisotropic, and in some media (such as liquid crystals) it is possible to induce anisotropy by applying e.g. an external electric field. Crystal optics - Isotropic media. Typical transparent media such as glasses are isotropic, which means that ...

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• Crystal optics - Isotropic media
• Crystal optics - Electric susceptibility
• Crystal optics - Anisotropic media
• Crystal optics - Other effects

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René Descartes (IPA: /deˈkaʁt/, March 31, 1596 – February 11, 1650), also known as Cartesius, was a noted French philosopher, mathematician, and scientist. Dubbed the "Founder of Modern Philosophy" and the "Father of Modern Mathematics," he ranks as one of the most important and influential thinkers of modern times. For good or ill, much of subsequent western philosophy is a reaction to his writings, which have been ...

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A phenomenon (plural: phenomena) is an observable event, especially something special (literally something that can be seen from the Greek word phainomenon = observable). Phenomenon - Kant's use of phenomenon. Phenomenon has a specialized meaning in the philosophy of Immanuel Kant who contrasted the term 'Phenomenon' with 'Noumenon'. Phenomena constitute the world as we experience it, as opposed to the world as it exists independently of our experiences (thing-in- ...

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• Phenomenon - Kant's use of phenomenon
• Phenomenon - Phenomenon in the general sense
• Phenomenon - Quotes

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and many more. Besides static two-dimensional images, the field also covers the processing of time-varying signals such as video and the output of tomographic equipment. Some techniques, such as morphological image processing, are specific to binary or grayscale images. ...

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Image processing, Image processing - Solution Methods, Image processing - Commonly Used Signal Processing Techniques, Image processing - One-Dimensional Techniques, Image processing - Two-Dimensional Techniques, Image processing - Typical Problems, Image processing - Applications, Image processing - Related Concepts

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Most of the signal processing concepts that apply to one-dimensional signals also extend to the two-dimensional image signal. Some of these one-dimensional signal processing concepts become significantly more complicated in two-dimensional processing. Image processing brings some new concepts, such as connectivity and rotational invariance, that are meaningful only for two-dimensional signals. The fast fourier transform is often used for image processing oper ...

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Image processing, Image processing - Solution Methods, Image processing - Commonly Used Signal Processing Techniques, Image processing - One-Dimensional Techniques, Image processing - Two-Dimensional Techniques, Image processing - Typical Problems, Image processing - Applications, Image processing - Related Concepts

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Virtual image is a term used in optics and physics. It is a representation of an actual object (source) formed by diverging rays of light which seem to originate from the image, but in reality do not cross at that position. A screen or an observer placed where a virtual image appears to be cannot actually "see" it. For example, a plane or convex mirror forms a virtual image positioned behind the mirror. Although rays of light seem to come from behind the mirror, light from the so ...

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In physics and optics, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material's dispersion (variation of refractive index with wavelength). It is named for Ernst Abbe (1840-1905), the German physicist who defined it. The Abbe number V of a material is defined as: where nD, nF and nC are the refractive indices of the material at the wavelengths of the Fraunhofer D-, F- and C- spectral lines (589.2 nm, 486.1 nm and 656.3 nm respectively). Low ...

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Absorption, in optics, is the process by which the energy of a photon is taken up by another entity, for example, by an atom whose valence electrons make a transition between two electronic energy levels. The photon is destroyed in the process. The absorbed energy can be lost by heat and radiation. The absorbance of an object quantifies how much light is absorbed by it. This may be related to ot ...

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Odem (אודם) is a cooperative moshav situated in the northern part of the Golan Heights. It is located on Mount Odem, at a height of 1,090 meters above sea level, making it the second highest town in Israel. It is surrounded by the Odem Forest. Odem means ruby and signifies the red colour. In this case it refers to the color of the rocks of Mount Odem, an extinct volcano. The Israeli government approved the establishment of the settlement in 1975, and a group of young people occupied an abandoned Syrian ...

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Glasses, spectacles, or eyeglasses are frames bearing lenses worn in front of the human eyes, sometimes for purely aesthetic reasons but normally for vision correction or eye protection. Special glasses are used for viewing three-dimensional images or experiencing virtual reality. Modern glasses are typically supported by pads on the bridge of the nose and by temples placed over the ears. Historical types ...

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• Glasses - History
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• Glasses - Conditions glasses are used to correct
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• Glasses - Glasses as a fashion accessory
• Glasses - Other names for glasses

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University of Michigan, Ann Arbor The University of Michigan, Ann Arbor (U-M, "U of M", or U-Mich) is a public coeducational university in Michigan, United States. The flagship and oldest campus of the University of Michigan is consistently ranked as one of the top academic institutions in the world,^Including:

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The word complement (with an e in the second syllable, not to be confused with a different word, compliment with an i) has a number of uses. Generally a complement of X is something that together with X makes a complete whole; that supplies what X lacks. The first e in complete and the first e in complement are etymological cognates of each other in a way that is a useful mnemonic for remembering that this is not compliment with an i. In painting

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Coherence is from Latin cohaerere = stick together, to be connected with, logically consistent. See: Coherence (physics). Coherence is an attribute of physical quantities that can be described in terms of waves when a well-defined wavefront can be defined, as in classical optics. Coherence (linguistics). In linguistics, coherence is what makes a text semantically meaningful. Cache coherence and (more generally) memory coherence are concepts in computer architecture. Coherentism is an epis

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Sir David Brewster, (December 11, 1781 – February 10, 1868) was a Scottish scientist and writer. He was born at Jedburgh, where his father, a teacher of high reputation, was rector of the grammar school. At the age of twelve he was sent to the University of Edinburgh, being intended for the clergy. However, he had already shown a strong inclination for natural science, and this had been fostered by his intimacy with a "self-taught philosopher, astronomer and mathematician," as Sir Walter Scott called him, of great local fame—James Veitch of Inchbonn ...

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In quantum mechanics a coherent state is a specific kind of quantum state of the quantum harmonic oscillator whose dynamics most closely resemble the oscillating behaviour of a classical harmonic oscillator system. It was the first example of quantum dynamics when Erwin Schrödinger derived it in 1926 while searching for solutions of the Schrödinger equation that satisfy the correspondence principle. The quantum harmonic oscillator and hence, the coherent state, arise in the quantum theory of a wide range of physical systems. For ins ...

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• Coherent state - Coherent states in quantum optics
• Coherent state - Quantum mechanical definition
• Coherent state - Mathematical characteristics
• Coherent state - Coherent states of Bose-Einstein condensates
• Coherent state - Generalizations

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Computer vision is the study and application of methods which allow computers to "understand" image content or content of multidimensional data in general. The term "understand" means here that specific information is being extracted from the image data for a specific purpose: either for presenting it to a human operator (e. g., if cancerous cells have been detected in a microscopy image), or for controlling some process (e. g., an industry robot or an autonomous vehicle). The image data that is fed into a computer vision system is of ...

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• Computer vision - A University Video Communication on Model-Based Computer Vision
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The Wigner quasi-probability distribution was introduced by Eugene Wigner in 1932 to study quantum corrections to classical statistical mechanics. The goal was to replace the wavefunction that appears in Schrodinger's equation with a probability distribution in phase space. It was independently derived by Hermann Weyl in 1931 as the symbol of the density matrix in representation theory in mathematics. It was once again derived by J. Ville in 1948 as a quadratic (in signal) representation of the local time-frequency energy of a signal. ...

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• Wigner quasi-probability distribution - Mathematical properties
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A line, or straight line, can be described as an (infinitely) thin, (infinitely) long, perfectly straight curve (the term curve in mathematics includes "straight curves"). In Euclidean geometry, exactly one line can be found that passes through any two points. The line provides the shortest connection between the points. Three or more points that lie on the same line are called collinear. Two different lines can either be parallel and never meet, or may intersect at one and only one point. Two planes intersect in at most one line). Lines in a Cartesian plane can be describe ...

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Sir William Rowan Hamilton (August 4, 1805 – September 2, 1865) was an Irish mathematician, physicist, and astronomer who made important contributions to the development of optics, dynamics, and algebra. His discovery of quaternions is perhaps his best known investigation. Hamilton's work in dynamics was later significant in the development of quantum mechanics, where a fundamental concept called the Hamiltonian bears his name. Hamilton showed immense talent at a very early age, prompting Dr. John Brinkley, astronomer and bishop of ...

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The culture of the United Kingdom is rich and varied, and has been influential on culture on a worldwide scale. It is a European country, and has many cultural links with its former colonies, particularly those that use the English language (the Anglosphere). Considerable contributions to British culture have been made over the last half-century by immigrants from the Indian Subcontinent and the West Indies. While it can be argued that a common British identity still permeates society (though this is a contested and contentious assert ...

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The culture of Greece has evolved over thousands of years, with its beginnings in Ancient Greece, through the influence of the Roman Empire, the Byzantine Empire, the Ottoman Empire, and Greek independence. Greece is often called the cradle of Western civilisation. Culture of Greece - Art and architecture. The art and architecture of ancient Greece have greatly influenced Western art through the present day. Byzantine art and architecture also played an important role in early Christianity, and remai ...

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