<human>:  Who invented the invisibility cloak?
<bot>: The invisibility cloak was invented by Sir John Pendry in 2006. It is based on the same principles as the cloak of invisibility in the Harry Potter books. The cloak of invisibility is a cloak that makes the wearer invisible to the naked eye. The invisibility cloak is a cloak that makes the wearer invisible to the naked eye, but not to radar or other electromagnetic waves.