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MANIPULATING LIGHT. A CLOAKING DEVICE THAT COULD HIDE OBJECTS, PEOPLE AND TIME ITSELF.

Email StoryPrint StoryA concept straight out of science fiction could one day make it possible to "hide" history by editing out passages of time. Skip related content
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'Spacetime cloak' could conceal history
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.The "spacetime cloak" would speed up and slow down light to give the illusion that events have not happened.

A "cloaked" individual could, for instance, travel from one place to another while appearing to vanish and rematerialise instantaneously in a new location. Such a device would also make a mockery of CCTV, disproving the adage that the camera never lies.

A scientifically-savvy thief with access to the technology could open a safe, empty its contents, and make his escape right under the watchful eye of a surveillance camera.

The video footage would show that the safe door was closed all the time. In effect, events in history could be "edited out" so that they never appear to have happened.

It sounds like the stuff of fantasy, but scientists at Imperial College London have proved it could work in theory by adapting standard fibreoptic technology.

As well as being a safe-cracker's dream, they believe the idea has a wealth of more practical applications in the realms of data processing and computing.

Lead scientist Professor Martin McCall said: "We have shown that by manipulating the way the light illuminating an event reaches the viewer, it is possible to hide the passage of time.

"If you had someone moving along the corridor, it would appear to a distant observer as if they had relocated instantaneously, creating the illusion of a Star Trek transporter. So, theoretically, this person might be able to do something and you wouldn't notice."

In previous experiments scientists have shown that light can be curled around objects to make them seem invisible.

The "invisibility cloak" technology employs so-called "metamaterials" whose structure allows light rays to be bent or even reversed.

The new research goes a step further by devising a way to conceal events

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