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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
This distinction is made in the table below in the area column, where "GB" means Great Britain, which is made up of England, Scotland and Wales, and excludes Northern Ireland, and "UK" means United Kingdom, which includes Northern Ireland. Plaid Cymru only stand candidates in Wales and the SNP only stand candidates in Scotland.
In the run-up to the next Scottish Parliament election, various organisations are conducting opinion polls to gauge voting intentions. Results of such polls are displayed in this list. The pollsters listed are members of the British Polling Council (BPC) and abided by its disclosure rules. The date range for these opinion polls is from the ...
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ALBANY, N.Y. (AP) — “Son of Sam” killer David Berkowitz, who set New York City on edge with late-night shootings in the 1970s, was denied parole after his twelfth board appearance. Berkowitz ...
The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...
A new political action committee has begun pouring money into a key Oregon swing district just days before the Democratic primary there, raising questions about whether Republicans are trying to ...
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Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...
The worried mother of a U.S. soldier in Russian custody said Wednesday that her son “was lured” there by a Russian woman he had been seeing in South Korea for over a year and that he’s being ...