"Now, Potter", said Snape in a sharp whisper, and pulled Harry along a shadowy wall towards the door, through it and out into the open air. "Follow me, Potter", said Snape briskly.
In the Harry Potter novels, the cloak of invisibility enabled Harry and his friends, Hermione Granger and Ron Weasley, to explore Hogwarts School of Witchcraft and Wizardry without being seen or ...
Because light is a type of electromagnetic radiation, this advance could one day lead to visible-light cloaks — yes, a possible real life invisibility cloak, Harry Potter style.