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Florida keratopathy, also known as Florida spots, is an eye condition characterized by the presence of multiple spots within both corneas. [1] It is most commonly seen in dogs and cats, but is also rarely seen in horses and birds. [2]
(Reuters) -The U.S. Food and Drug Administration has approved Elanco Animal Health's skin disease treatment for dogs, the health regulator's website showed on Thursday, sending the company's ...
Augustin-Jean Fresnel[ Note 1 ] (10 May 1788 – 14 July 1827) was a French civil engineer and physicist whose research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Newton 's corpuscular theory, from the late 1830s [ 3 ] until the end of the 19th century.
A Fresnel lens (/ ˈfreɪnɛl, - nəl / FRAY-nel, -nəl; / ˈfrɛnɛl, - əl / FREN-el, -əl; or / freɪˈnɛl / fray-NEL[ 1 ]) is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.
Formation of the Arago spot (select "WebM source" for good quality). In optics, the Arago spot, Poisson spot, [1][2] or Fresnel spot[3] is a bright point that appears at the center of a circular object's shadow due to Fresnel diffraction. [4][5][6][7] This spot played an important role in the discovery of the wave nature of light and is a ...
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A Fresnel rhomb is an optical prism that introduces a 90° phase difference between two perpendicular components of polarization, by means of two total internal reflections.
The Fresnel equations (or Fresnel coefficients) describe the reflection and transmission of light (or electromagnetic radiation in general) when incident on an interface between different optical media. They were deduced by French engineer and physicist Augustin-Jean Fresnel (/ freɪˈnɛl /) who was the first to understand that light is a transverse wave, when no one realized that the waves ...
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