PRE 84, 046607 (2011)
- Most invisibility cloak designs have one serious drawback - they make it impossible for anyone hiding under the cloak to see what's going on in the outside world. Researchers have now come up with an approach that, in theory, should allow us to make cloaks that allow you to peek out while remaining entirely hidden. In effect, they propose making a tiny tear in the cloak, and then stitching the hole with a two types of materials chosen to effectively cancel each other out when seen from the outside, while still allowing light to enter. Although the invisibility cloak design currently exists only on paper, it theoretically ensures that aspiring Harry Potters remain invisible while keeping an eye on the Voldemorts and Snapes all around them.
