On the up and up: levitating particles & a frog, with sound & magnets
Two visual demonstrations of levitation, each using known physics properties:
1. Using sound waves to levitate particles [REFERENCE: "Three-dimensional Mid-air Acoustic Manipulation by Ultrasonic Phased Arrays," Yoichi Ochiai, Takayuki Hoshi, Jun Rekimoto, (2013) arXiv:1312.4006.. Thanks to @BetsytheDevine for bringing this to our attention.]:
2. The Ig Nobel Prize-winning levitation of a frog, using magnets [REFERENCE: "Of Flying Frogs and Levitrons," Michael V. Berry and Andre K. Geim [who has a rather colorful biography], European Journal of Physics, v. 18, 1997, p. 307-13.]:
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