According to the press release from the Argonne National Laboratory, the process occurs using an acoustic levitator. The two small speakers generate sound that is barely audible to the human ear. One wavelength is emitted from the top speaker and the other from the bottom so they perfectly interfere with each other. This triggers a phenomenon known as a standing wave.
The acoustic pressure from the standing waves cancels out the effect of gravity at certain points, called nodes, which allows light objects to be levitated.
- The Dutch Safety Board has released a final report of its investigation into why Malaysian Airlines Flight MH17 broke up over Ukraine in 2014. ›
- Iran's parliament approved a deal on its nuclear program, which was agreed in July following lengthy talks between six world powers. ›
- SAB Miller has accepted "in principle" a takeover offer from Anheuser-Busch InBev, which would create the world's largest beer company. ›