For high-resolution, contactless recording of distance and the time it takes light to cover that distance using CASSY (
524 013,
524 006,
524 005W2,
524 018) or the universal physics measuring instrument (
531 835). The time-dependent measurement of distance allows high-resolution and non-contact recording of motion (such as on a track or in a free fall). The time delay measurement between laser motion sensor S and a reflector can be used to determine the speed of light in different media (air, glass, etc.). As a reflector a piece of retro-reflective sheeting supplied is glued to an object (e.g., trolley and rider).
