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An Arago spot of electrons, which also constitute matter waves, can be observed in transmission electron microscopes when examining circular structures of a certain size. The observation of an Arago spot with large molecules, thus proving their wave-nature, is a topic of current research.
The light diffracted around the edge of a perfectly circular occluder interferes constructively at the central axis, producing a bright spot known as the Arago spot.The resolution at that point would be equal to the resolution of a conventional lens with the same size as the occluder, although the light would be much less intense. [1]
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Arago telescope (Lunette Arago) is a 38 cm (15 inch) aperture refracting telescope at Paris Observatory, installed in 1857. [1] Francois Arago ordered this telescope from the telescope making firm Lebreours in 1839, and after a protracted development was completed by 1855. [ 2 ]
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Dominique François Jean Arago (Catalan: Domènec Francesc Joan Aragó), known simply as François Arago (French: [fʁɑ̃swa aʁaɡo]; Catalan: Francesc Aragó, IPA: [fɾənˈsɛsk əɾəˈɣo]; 26 February 1786 – 2 October 1853), was a French mathematician, physicist, astronomer, freemason, [1] supporter of the Carbonari revolutionaries [2 ...
The nominator has not made an actual case for the change. He cites one not-particularly authoritative source, but one can easily cite many sources that use either "Poisson Spot" or "Arago Spot"/"Spot of Arago". Something more is required to establish which term is more common.--Srleffler 16:40, 10 October 2020 (UTC)
On December 22, 2014, the Luzerne County Council voted to transfer ownership of the park to the Commonwealth of Pennsylvania. [18] Council also transferred Seven Tubs Natural Area and a 400 acres (160 ha) parcel adjacent to Moon Lake Park. Council said that "[PA DCNR] will do a better job managing the county sites for recreation.