Levitation is not only the domain of swamis and wizards. Science, too, can make objects float, like the electrical fields that levitate frogs or the magnets responsible for the epic phenomoenon known as quantum locking.
Sound, too, can be used to suspend objects in space, via acoustic levitation. We’ve seen this before, in this video, but now it’s been taken to the next level.
Acoustic levitation works because high frequency sound waves will interfere and form standing waves. Small objects can then be suspended at the “nodes” of those waves. Dimos Poulikakos has developed a way to guide those nodes toward each other, letting them initiate floating chemistry without a single human touch.
Here we see the violent reaction between sodium metal and water, captured in levitating glory.
More at New Scientist.