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Different colors of LED light illuminate a small corked test tube with no reaction. Ultraviolet light causes an explosion that shoots the cork across the room.
Video of our demo in action https://youtu.be/NN82GoBG98s
Another video of our demo...
A 1.5m length of string driven at one end and fixed at the other shows standing waves for various driving frequencies.
The fundamental is the most dramatically visible state (usually around 15Hz). It's possible to show up to 8 nodes clearly-...
