stroboscope -
scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary
stroboscope -
Instrument for studying or observing periodic movement by rendering a moving body visible only at regular intervals.
stroboscope -
A lamp that produces short bursts of light that synchronizes with a camera shutter for photographing fast-moving objects; A photo made by such a machine.
Wikipedia
A stroboscope, also known as a strobe, is an instrument used to make a cyclically moving object appear to be slow-moving, or stationary. The principle is used for the study of rotating, reciprocating, oscillating or vibrating objects. Machine parts and vibrating strings are common examples.
