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The maximum beam intensity was 50 million candelas without the spreading lens and about 20 million candelas with the lens. Total weight was 1,100 lb (500 kg). The Nacelle type, fitted on Catalinas and Liberators, was a 20-inch (510 mm) searchlight mounted in a nacelle 32 inches (810 mm) in diameter slung from the bomb lugs on the wing.
A large searchlight called a Leigh light was suspended from the bottom of the wing or fuselage, and would be used to illuminate the surfaced U-boat while it was being attacked with bombs and depth charges. The Leigh light was somewhat more successful than the Turbinlite, but in both cases the development of centimeter-wave radar proved to be ...
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Léon Foucault developed a catadioptric microscope in 1859 to counteract aberrations of using a lens to image objects at high power. [2] In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror , a concave glass reflector with the silver surface on the rear side of the glass.
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The unemployment rate edged up moderately to 4.2% from October's 4.1%. ... The Powell-led rate-setting panel will announce a rate decision at the conclusion of its meeting on Wednesday, January 29 ...
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