What musical instrument?
Balance, spring dynamometer, ruler, stopwatch, dot timer, spark timer, voltmeter, ammeter, resistance box, sliding rheostat, sensitive galvanometer, self-inductance coil, capacitor, sensor, oscilloscope, double slit, single peak, prism, optical bench, convex lens, concave lens, flat mirror, polarizer,
Spectrometer, Michelson interferometer, mass spectrometer, speed selector, cyclotron, electron microscope, etc. .
If it helps you, please adopt it.