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Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]
The IsiA protein can also provide photoprotection for PSII. [3] Plants, algae and some bacteria use two photosystems, PSI with P700 and PSII with P680. Using light energy, PSII acts first to channel an electron through a series of acceptors that drive a proton pump to generate adenosine triphosphate (ATP), before
The idea of a proximity fuse had long been considered militarily useful. Several ideas had been considered, including optical systems that shone a light, sometimes infrared, and triggered when the reflection reached a certain threshold, various ground-triggered means using radio signals, and capacitive or inductive methods similar to a metal detector.
That shift was predicated, according to a slew of follow-up reports, on concerns regarding Luka’s commitment to conditioning, the possibility that hard living and light work might conspire to ...
230/240-volt incandescent light bulb with E27 screw baseEdison screw (ES) is a standard lightbulb socket for electric light bulbs. It was developed by Thomas Edison (1847–1931), patented in 1881, [1] and was licensed in 1909 under General Electric's Mazda trademark.
A modern dive light usually has an output of at least about 100 lumens. Bright dive lights have values from about 2500 lumens. Halogen lamps provide this light at over 50W power consumption. High-intensity discharge lamps (HID) [6] and Light-emitting diodes (LED) can provide similar output for less power. [8]
Water crane A device used for delivering a large volume of water into the tank or tender of a steam locomotive Wessie A British Rail Class 442 electric multiple unit—from the "Wessex Electric" brand name used at launch [110] Western A British Rail Class 52 diesel-hydraulic type 4 locomotive, 74 of which ran on BR between 1961 and 1977.
Whilst producers were aware of the switch to the new group, Bill Cotton, the then head of the light entertainment unit of which Top Of The Pops was part, was not. This group started as a seven-piece with three men ( Gavin Trace , Floyd Pearce and Phil Steggles ) and four women (Menhenick, Gillespie, Patti Hammond and Lulu Cartwright ).