Tractor Beam uses acoustic waves to levitate object
Posted: Thu Jan 25, 2018 6:11 pm
It seems that the Sci-fi version will remain sci-fi for decades, but they have made progress:
https://www.techspot.com/news/72873-tractor-beam-breakthrough-could-allow-levitating-humans.html
https://www.techspot.com/news/72873-tractor-beam-breakthrough-could-allow-levitating-humans.html