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Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
Ernst Abbe (1840–1905), working for Carl Zeiss AG in Jena, Germany in the late 19th century, was the first to develop a laboratory refractometer. These first instruments had built-in thermometers and required circulating water to control instrument and fluid temperatures. They also had adjustments for eliminating the effects of dispersion and ...
The Ohio Department of Insurance was established on March 12, 1872. It was created under the authority of section 121.02 of the Ohio Revised Code (ORC) and is administered by the Director of Insurance. Insurance companies operating in the state of Ohio are subject to regulation under Title 39; and depending upon the entity of the organization ...
In a nutshell it’s health insurance for people 65 or older and includes Part A (hospital insurance) and Part B (medical insurance). Usually, Part A is premium-free if you’ve paid Medicare ...
June 27, 2024 at 12:37 PM. COLUMBUS, Ohio (AP) — Ohio lawmakers advanced a ban on transgender students using bathrooms that fit their gender identity in a late-night state House vote Wednesday ...
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