A tachitoscope is a device used to measure and display the speed of an object in motion. It works by using a series of rapidly flashing lights or images that create an illusion of continuous motion, allowing for precise measurement of speed. Originally developed for use in scientific experiments and sports training, tachitoscopes are now commonly used in the automotive industry to test and improve vehicle performance. The term is derived from the Greek words “tachys” meaning speed and “skopein” meaning to see, reflecting the device’s ability to visually capture and analyze speed.