SEARCH LIGHT

It’s History… 

A searchlight (or spotlight) is an apparatus that combines an extremely bright source (traditionally a carbon arc lamp) 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 swivelled about.[1]

[1] https://www.britannica.com/technology/searchlight-lighting

 
Searchlights were used extensively in defence against night-time bomber raids during the Second World War. Controlled by sound locators and radars, searchlights could track bombers, indicating targets to anti-aircraft guns and night fighters and dazzling crews.

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