the.com/strobe light

means A lamp that fires rapid, brief flashes instead of glowing steadily, used to freeze or fragment motion into a series of still moments.

from From Greek 'strobos,' meaning a whirling or twisting around — the same root behind 'strobile.' The word was adapted in the early 20th century for devices that produced rapid flashing light, first used by scientists and engineers (notably in stroboscopes) to visually 'stop' or slow fast-spinning or moving objects by timing light pulses to their motion. The 'light' part is just English doing its plain descriptive duty, bolted onto the borrowed Greek whirl.