The Noah Project

Rebuilding a sustainable world.

Invisibility Cloak Fast Becoming a Reality

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In The Mail Online, James Rush provides fascinating information on an invisibility cloak, designed by scientists, that is big enough to hide a human or a satellite orbiting earth.  Can the search for Planet  Q’onoS be far behind?

While it's not quite the same as the invisibility cloak worn by Harry Potter, scientists have revealed how it is possible to steer light around the region of space they want to hide using lenses and mirrors

Over the last ten years scientists have investigated two main ways of creating invisibility cloaks, according to the MIT Technology Review.

‘Transformation optics’ involves bending light around an object to make it look as if it wasn’t there.
Metamaterials meanwhile are synthetic substances which can also achieve the same aim through using certain optical properties.

Neither technology is perfect, but John Howell, from the University of Rochester, New York, and Benjamin Howell have now shown how to build a device big enough to cloak a person using an array of lenses and mirrors to steer light around a region of space.

A major caveat in the design is that they only work in one direction – viewing the cloaks from any other pint of view reveals the device.

But the Howells have said: ‘The devices may have value, for example, in cloaking satellites in mid to high-Earth orbit.’

Earlier this week, scientists unveiled a ‘time cloak’ which bends light to tear holes in time itself.

The device could have important implications for sending secret messages via fibre optic cables.

It can hide a continuous stream of events at telecommunications data rates – much quicker than a similar invention unveiled last year.

Researchers used equipment known as modulators to make the holes by bending light, Nature reported.

Although a long way off the fictional ‘invisibility cloaks’ featured in Star Trek and the Harry Potter films the concept could have practical applications to conceal messages.

By JAMES RUSH
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Read more here.
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Author: Daniela

I was born in Croatia, at that time Yugoslavia. My family moved to the US when I was very young, but I still treasure the memories of my grandfather teaching me how to protect myself against the "evil eye," my grandmother shopping early every morning, at the open air market, to buy the freshest vegetables for the day's meals, and the traditions that were the underpinnings of our society. Someone once noted that "For all of us that want to move forward, there are a very few that want to keep the old methods of production, traditions and crafts alive." I am a fellow traveler with those who value the old traditions and folk wisdom. I believe the knowledge they possess can contribute significantly to our efforts to build a more sustainable world; one that values the individual over the corporation, conservation over growth and happiness over wealth.

2 thoughts on “Invisibility Cloak Fast Becoming a Reality

  1. Pingback: I for one did not see invisibility cloak coming | dp@large

  2. Pingback: Optical Cloaking, can you see me now? | Isnotbad

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