strobe

A strobe light.

A stroboscope.

A spot of higher than normal intensity in the sweep of an indicator, as on a radar screen, used as a reference mark for determining distance.

A stroboscopic lamp, a device used to produce regular flashes of light

To flash like a stroboscopic lamp.

scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary