SCIENCE IN THE NEWS DAILY
How to See Around Corners
from Nature News
The ability to see objects hidden behind walls could be invaluable in dangerous or inaccessible locations, such as inside machinery with moving parts, or in highly contaminated areas. Now scientists at the Massachusetts Institute of Technology in Cambridge have found a way to do just that.
They fire a pulse of laser light at a wall on the far side of the hidden scene, and record the time at which the scattered light reaches a camera. Photons bounce off the wall onto the hidden object and back to the wall, scattering each time, before a small fraction eventually reaches the camera, each at a slightly different time.
It's this time resolution that provides the key to revealing the hidden geometry. The position of the 50-femtosecond (that's 50 quadrillionths of a second) laser pulse is also changed 60 times, to gain multiple perspectives on the hidden scene.
Connect With Us:
ANIMATION: Revealing the Logic Behind Candy Crush
Candy Crush is turned into a model electrical circuit, which can be used to structure the equivalent of a logic puzzle. Besides justifying Candy Crush addictions, this information could be used to harness the player power of this game for bigger concerns, including computer security.
Watch the behind-the-scenes movements and how it is truly a logic puzzle.
To view all multimedia content, click "Latest Multimedia"!
Receive notification when new content is posted from the entire website, or choose from the customized feeds available.