noun
stroboscope
A device that produces regular flashes of light, used to make moving objects appear stationary or to measure rotational speed. In everyday Japanese, the shortened form ストロボ is more common.
ストロボスコープを使って回転数を測定した。
We measured the rotational speed using a stroboscope.
ストロボスコープの原理は、断続的
The principle of the stroboscope uses the visual effect of intermittent light.