stroboscope

/ˈstroʊbəˌskoʊp/
noun
  1. A device that produces short, bright flashes of light, used to study or photograph fast-moving objects by making them appear still or slow-moving.
    • The repair shop used a stroboscope to see if the car's ignition system was working correctly.
    • The engineer used a stroboscope to check the timing of the spinning engine parts.
    • At the science fair, we watched a fan's blades appear frozen in midair thanks to a stroboscope.
  2. A light that flashes on and off rapidly, often used for special effects at concerts, parties, or in clubs.
    • We bought a small stroboscope for our Halloween party to create a spooky atmosphere.
    • The DJ turned on the stroboscope, and the dance floor filled with flashing lights.
    • The band's performance was enhanced by a stroboscope that pulsed with the beat of the music.
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