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History
Searchlight
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A searchlight is an apparatus that combines an extremely bright source with a mirrored parabolic reflector to project a powerful beam of light of approximately parallel rays in a particular direction. It is usually constructed so that it can be swiveled about.
ATS officers-in-training crew a 90 cm searchlight in Western Command, 1944
ATS officers-in-training crew a 90 cm searchlight in Western Command, 1944
Russian troops use a searchlight against a Japanese night attack during the Russo-Japanese War, 1904
Russian troops use a searchlight against a Japanese night attack during the Russo-Japanese War, 1904
Homeland Security helicopter utilizing its searchlight.
Homeland Security helicopter utilizing its searchlight.
American searchlight crew and equipment in France during WWI
American searchlight crew and equipment in France during WWI
Arc lamp
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An arc lamp or arc light is a lamp that produces light by an electric arc.
The 15 kW xenon short-arc lamp used in the IMAX projection system.
The 15 kW xenon short-arc lamp used in the IMAX projection system.
A mercury arc lamp from a fluorescence microscope.
A mercury arc lamp from a fluorescence microscope.
A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrod
A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrodes, in particular, the cathode (on the left).
A krypton arc lamp during operation.
A krypton arc lamp during operation.