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Conceptual animation of the dispersion (or breaking down) of light Monochromator in an x-ray beamline at the Advanced Photon Source, Argonne National Laboratory.. A monochromator is an optical device that transmits a mechanically selectable narrow band of wavelengths of light or other radiation chosen from a wider range of wavelengths available at the input.
Massimiliano Spalazzi took over from Anammah as CEO in Nigeria in January 2020 and Anammah was appointed chairwoman of Jumia Nigeria and the Head of Institutional Affairs, Africa. [15] In 2015, Jumia generated $234 million in revenue, a 265% growth from 2014. [16] In 2016, Jumia became the continent’s first unicorn being valued at over 1 ...
The glass version of these lenses achieves their photochromic properties through the embedding of microcrystalline silver halides (usually silver chloride) in a glass substrate. Plastic photochromic lenses use organic photochromic molecules (for example oxazines and naphthopyrans) to achieve the reversible darkening effect. These lenses darken ...
Unless the two surfaces are perfectly flat, there will be a small gap between them (shown), which will vary with the contour of the surface. Monochromatic light (red) shines through the glass flat and reflects from both the bottom surface of the optical flat and the top surface of the test piece, and the two reflected rays combine and superpose ...
Jumia Travel was founded in 2013 by the E-commerce platform Africa Internet Group (now Jumia Group) and is backed by MTN, Rocket Internet, Millicom, Orange, Axa and other financial partners. [11] Operations were started in 2013 in Nigeria and Kenya by company's co-founder Marek Zmysłowski [12] and Estelle Verdier. [13]
Two mammalian orders containing marine mammals exhibit monochromatic vision: Pinnipeds (including seals, sea lions and walruses) Cetaceans (including dolphins and whales) Unlike the trichromacy exhibited in most primates, Owl monkeys (genus Aotus) are also monochromats [citation needed].
Fraunhofer prepared glasses which reduced the secondary spectrum; but permanent success was only assured on the introduction of the Jena glasses by E. Abbe and O. Schott. In using glasses not having proportional dispersion, the deviation of a third colour can be eliminated by two lenses, if an interval be allowed between them; or by three ...
Many types of glass have been developed to reduce chromatic aberration. These are low dispersion glass, most notably, glasses containing fluorite. These hybridized glasses have a very low level of optical dispersion; only two compiled lenses made of these substances can yield a high level of correction. [9]
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