Definition: Stroboscope: type of electronic flash-unit in which the flash repeats more or less rapidly. * Flash frequency can be a few flashes per second to many thousands of flashes per second, and the flash duration can be shorter than a micro-second. * So-called because it can produce stroboscopic effects i.e. it makes e.g. rapidly rotating parts appear to stand still when the rate of flashing of light equals the rate of rotation. * Also known as a short-flash light source.

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