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A dive light is routinely used during night dives and cave dives, when there is little or no natural light, but also has a useful function during the day, as water absorbs the longer (red) wavelengths first then the yellow and green with increasing depth. By using artificial light, it is possible to view an object in full color at greater depths.
Architecture of the night or nocturnal architecture, also referred to as illuminated architecture and, particularly in German, light architecture, is architecture designed to maximize the effect of night lighting, which may include lights from within the building, lights on the facade or outlining elements of it, illuminated advertising, and ...
J. P. Knight John Peake Knight Inventor of the Traffic light Born John Peake Knight (1828-01-13) 13 January 1828 Nottingham, England Died 23 July 1886 (1886-07-23) (aged 58) Resting place Brompton Cemetery Nationality British Education Nottingham High School Occupation Engineer Spouse Elizabeth Knight (1832–1913) Children 5 Engineering career Employer(s) South Eastern Railway (England ...
A nightlight is a small light fixture, usually electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as at night or during an emergency. Small long-burning candles serving a similar function are referred to as "tealights".
The effect is well known as an illusion affecting pilots who fly at night. It is particularly dangerous for pilots flying in formation or rejoining a refueling tanker at night. Steps that can be taken to prevent or overcome the phenomenon include: Shifting your gaze frequently to avoid prolonged fixation on light sources.
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