To test the invisibility cloak, researchers first fired microwaves at a copper cylinder and recorded the electronic shadow it cast. They next showed in contrast that microwaves largely pass around the invisibility cloak as if it weren't there. "There is some reflection, so this isn't perfect, but it is only a prototype," says David Schurig of Duke University.
Sounds interesting, but a cloak like Harry's would be impossible...in theory you would be invisible, but you couldn't see out...so that sucks!
