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  1. #1
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    Scientists Figure Out How to Cloak Time

    It's one thing to make an object invisible, like Harry Potter's mythical cloak. But scientists have made an entire event impossible to see. They have invented a time masker.

    Think of it as an art heist that takes place before your eyes and surveillance cameras. You don't see the thief strolling into the museum, taking the painting down or walking away, but he did. It's not just that the thief is invisible - his whole activity is.
    What scientists at Cornell University did was on a much smaller scale, both in terms of events and time. It happened so quickly that it's not even a blink of an eye. Their time cloak lasts an incredibly tiny fraction of a fraction of a second. They hid an event for 40 trillionths of a second, according to a study appearing in Thursday's edition of the journal Nature. We see events happening as light from them reaches our eyes. Usually it's a continuous flow of light. In the new research, however, scientists were able to interrupt that flow for just an instant.
    Other newly created invisibility cloaks fashioned by scientists move the light beams away in the traditional three dimensions. The Cornell team alters not where the light flows but how fast it moves, changing in the dimension of time, not space. They tinkered with the speed of beams of light in a way that would make it appear to surveillance cameras or laser security beams that an event, such as an art heist, isn't happening.
    Another way to think of it is as if scientists edited or erased a split second of history. It's as if you are watching a movie with a scene inserted that you don't see or notice. It's there in the movie, but it's not something you saw, said study co-author Moti Fridman, a physics researcher at Cornell.
    Time hole
    The scientists created a lens of not just light, but time. Their method splits light, speeding up one part of light and slowing down another. It creates a gap and that gap is where an event is masked.
    "You kind of create a hole in time where an event takes place," said study co-author Alexander Gaeta, director of Cornell's School of Applied and Engineering Physics. "You just don't know that anything ever happened."
    This is all happening in beams of light that move too fast for the human eye to see. Using fiber optics, the hole in time is created as light moves along inside a fiber much thinner than a human hair. The scientists shoot the beam of light out, and then with other beams, they create a time lens that splits the light into two different speed beams that create the effect of invisibility by being too fast or too slow. The whole work is a mess of fibers on a long table and almost looks like a pile of spaghetti, Fridman said.
    Scientists figure out how to "cloak" time - CBS News



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    Re: Scientists Figure Out How to Cloak Time



    ?



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    Re: Scientists Figure Out How to Cloak Time

    Cool stuff. Alot of people have no idea that time isn't relative and goes faster and slower depending on your speed through space.



  4. #4
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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by WalkingCY View Post


    ?
    Seconded.



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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by Lateralus View Post
    Cool stuff. Alot of people have no idea that time isn't relative and goes faster and slower depending on your speed through space.
    Time is relative. It's the main point of Einstein's theory. Although how you describe it, I think you've just confused terminology.



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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by WalkingCY View Post


    ?
    uhh...thirded?

    But this is seriously AWESOME.



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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by Lateralus View Post
    Cool stuff. Alot of people have no idea that time isn't relative and goes faster and slower depending on your speed through space.

    I guess the Tralfamadorians (alien race) from Kurt Vonnegut's Slaughterhouse 5 would agree with you.

    Poor Billy Pilgrim.



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    Re: Scientists Figure Out How to Cloak Time

    Meh, people been doing this for years. It's called alcohol.



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    Re: Scientists Figure Out How to Cloak Time

    I dont mean to come off as ignorant, but why does this matter? Layman's terms. None of that inside, ******** jargon that nobody understands.



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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by bos View Post
    I dont mean to come off as ignorant, but why does this matter? Layman's terms. None of that inside, ******** jargon that nobody understands.
    T. Boone P. has $1,000,000 for the first scientist who can cloak about 3 hours on Friday Night, November 18, 2011


    No matter what, I could NEVER cheer for Dirt and Urine.

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    Re: Scientists Figure Out How to Cloak Time

    I sort of thought based on the title that this would just be about some scientists who drank too much one night and "time traveled".



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    Re: Scientists Figure Out How to Cloak Time

    So even with current technology, we still would have seen Janet Jackson's nipple at the Super Bowl.




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    Re: Scientists Figure Out How to Cloak Time

    So what kind of practical applications could arise from cloaking 0.0040 of a second? Oh, none. That's what I thought.



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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by Clonehomer View Post
    So what kind of practical applications could arise from cloaking 0.0040 of a second? Oh, none. That's what I thought.
    Your wife would still be unsatisfied however she wouldn't see why.



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    Re: Scientists Figure Out How to Cloak Time

    Quote Originally Posted by Clonehomer View Post
    So what kind of practical applications could arise from cloaking 0.0040 of a second? Oh, none. That's what I thought.
    I'm sure a lot of people said a similar thing about the Wright Brothers first flight. Why go to all that trouble to fly across a field?

    Then again, the tiny scale that a lot of this stuff is happening (This and the particle they supposedly moved faster than light) it's doubtful that anything will ever have a practical application in any of our lifetimes.

    If I had to really think of a positive in any of this, is the huge amount of energy ti takes to do a lot of this kind of work. Essentially, what's going to hold it back is an enerygy source that doesn't suck a eyars supply of energy in 10 seconds. So in the end, I am more hoping for enerygy breakthroughs that people are going to have to discover to make any of this practical. In a lot of ways, going to the moon was a complete waste of time and money. Other than to say, "Look what we did" But, the advancements in technology and every day useful products that came out of the space race were the real benefit. You have to start somewhere to push the limits of the known world.



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