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That's because it is a forward link. You need a reverse time link.
Sdrawkcab tou gnimoc era stsop ym
Ok, so it's like small town gossip.
Is this the OFST?
Good luck with that. A perfect square wave of frequency x consists of the fundamental sine wave x plus the sum of all odd harmonic sine waves of frequency x.
Infinity is a mighty big number to shoot for, and the infinitely high odd harmonic of a frequency of light is also a tad above a dog's hearing range.
The result is weird, but apparently theory predicted the result. So, yes. It's a weird world.
if they can make light travel backwards, can't they make a "dark bulb" for day sleepers? (I mean there are lots od DIM BULBS in congress...)
and if light can be made to go backwards, down't that mean it has mass? and doesn't that destroy the conservation of matter thoery that says that mass cannot be created nor destroyed since one can turn a light off and on?
Did he say that?
I had an employee that worked so slowly he went backwards...
Ain’t the quantum world fun?
Wow, fascinating.
Flux Capacitor Ping.
"an optical fiber that had been laced with the element erbium"
So, if the fiber needed to be repaired or upgraded, that would be kinda like erban renewal?
Bump.
Really nice article, PH. Every time I see a new physics breakthrough I'm painfully reminded of how specialized fields in science have become, because, to be quite honest, I really don't truly understand much of the physics they're talking about at all.
Wow, fascinating.
"As the pulse enters the material, a second pulse appears on the far end of the fiber and flows backward."
Sounds more like a reflection to me than a case of light "flowing backward." The only thing that seems odd about it when viewed in that way is the timing, i.e. that the second pulse appears immediately at the far end of the fiber, apparently just after the initial pulse enters the fiber.
So your first thought is that it can't be a reflection because the initial pulse has not yet gotten to the end of the fiber. However, they say that a portion of the light impulse is apparently flowing faster than its normal speed. I wonder if they just mean the normal speed thru the material, which might very well be less than the speed of light in a vaccuum. If so, then I'm not too suprised by the result. In fact, if that's the case, then it seems like they are making a mountain out of a mole hill.
There's a difference betwixt group velocity and phase veolcity.