01 Invent Yourself: Pinhole sunglasses
02 Disc spectrometer
03 Snail ball
04 Singing capacitor
06 Seeing sound
01 Invent Yourself: Pinhole sunglasses
02 Disc spectrometer
03 Snail ball
04 Singing capacitor
06 Seeing sound
A thin rubber membrane is stretched over a circular frame and driven into vibration by a loudspeaker. A small mirror is attached to the membrane, and a laser beam is reflected off it onto a distant screen. Under certain conditions, the laser spot traces out complex, steady, or evolving geometric patterns. Investigate the relationship between the driving parameters, the membrane’s properties, and the resulting light patterns.
