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Blue Strobe light. A strobe light or stroboscopic lamp, commonly called a strobe, is a device used to produce regular flashes of light. It is one of a number of devices that can be used as a stroboscope. The word originated from the Ancient Greek στρόβος ( stróbos ), meaning "act of whirling". A typical commercial strobe light has a ...
The history of traffic lights is associated with the historic growth of the automobile. [ 1] Traffic lights were first introduced in December 1868 on Parliament Square in London to reduce the need for police officers to control traffic. [ 2] Since then, electricity and computerised control has advanced traffic light technology and increased ...
Variations in traffic light operation. Swedish traffic light (left) for use by public transport vehicles only. All signals use white lighting and special symbols ("S", "–" and an arrow) to distinguish them from regular signals. The small light at the top tells the driver when the vehicle's transponder signal is received by the traffic light.
Traffic lights can have several additional lights for filter turns or bus lanes. Road crossing of A970 with Sumburgh Airport's runway in Shetland. The movable barrier closes when aircraft land or take off. Horizontally-mounted signals in Japan. A set of lights, known as a signal head, [19]: 3.2.4 may have one, two, three, or more aspects. The ...
A hide-away strobe light fitted into a headlamp. The strobe light is the coiled glass tube in the bottom of the headlight assembly, near the center of the highlighted region of the picture (click picture to enlarge). The vehicle's stock lighting may also be modified to add flashing and strobe effects.
Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light." [1] It is a disorientation -, vertigo -, and nausea -inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of human brainwaves.