A new cloaking device can make an object invisible across a wide range of angles. How exactly does it work? Amy joins us to discuss.
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The Invisibility Cloak You’ve Been Waiting For
“Everyone from Harry Potter to working physicists are fascinated with cloaking devices. In science fiction, capes can make kids invisible, but in real life, scientists have only been able to hide certain wavelengths of light — and so far those have been in the part of the spectrum we can’t see.”
‘Cloaking’ device uses ordinary lenses to hide objects across range of angles
“Inspired perhaps by Harry Potter’s invisibility cloak, scientists have recently developed several ways—some simple and some involving new technologies—to hide objects from view.”
Paraxial Ray Optics Cloaking
“Despite much interest and progress in optical spatial cloaking, a three-dimensional (3D), transmitting, continuously multidirectional cloak in the visible regime has not yet been demonstrated.”
‘Invisibility cloak’ uses lenses to bend light
“One of the problems with the cloaking devices developed to date — and it’s a big one — is that they really only work if both the viewer and whatever is being cloaked remain still.”
Photo © J. Adam Fenster / University of Rochester
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