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/sci/ - Science & Math


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5574978 No.5574978 [Reply] [Original]

Sci, what's supposed to happen when you destroy a wave with itself?

>> No.5575033
File: 1.39 MB, 4256x2832, 1361359350889.jpg [View same] [iqdb] [saucenao] [google]
5575033

Do I need to rephrase this question? Cmaaaan.

Since you can't destroy energy, where does the energy go?

>> No.5575047

>>5574978
This is extremely far from my area of expertise, but... why would the bar on the bottom fade to black? If we're talking electromagnetics and the visible spectrum, wouldn't the two waves combine into a single yellow "wave" and stay that way? In that case, the energy from both is still present.

I find this interesting and I'd like to know more, but the question seems a little vague to me.

>> No.5575065

>>5575047

nah man they are both waves from the same source, the green is a peak and the red is a trough. the little block in the bottom middle is a medium of higher density that retards the wave and shifts it out of sync, so that the wave goes trough to peak and cancels itsef.

it's a take on the delayed choice quantum eraser "theoretically" facilitating FTL communication via backfeed.. big emphasis on the quotes because I don't understand it and can't back it mathematically.

>> No.5575075

>>5575047
I posted the whole thing on my blog if you wanna give it a read: http://prismaforge.blogspot.co.at/2012/10/ftl-communication.html

Originally the idea was a wave computer (which still suffers from this problem)

the FTL assumption is that the wave particle will land wherever it is most probable, so if you constrain its movement in a waveguide the outgoing probabilities will shift and it will be more likely to come out of another terminal. if there are no open avenues it might just tunnel wherever. but i don't know that. what do I need to read to understand and predict tunneling?

I hope someone can still answer my original question.

>> No.5575078
File: 151 KB, 786x629, 4zTOtR2.gif [View same] [iqdb] [saucenao] [google]
5575078

>>5575065

<- why it won't turn yellow

>> No.5575085

>>5575065
>>5575075
Ok yeah this is way beyond me, I don't know the answer. Sorry, but I hope you find your solution! I'll be checking later to see what other people say, I find this stuff fascinating.

Also
>>5575033
I looooove that photo. Stuff like this is why I still frequent the APOD every day. I still have the photo saved to my wallpapers folder.

>> No.5575089

there's a full video of the gif on the nasa site, it's half a gig big. some day I plan on editing it into a continuous 90 minute loop and make a screensaver out of it, or project it onto my wall, or something.

>> No.5575091
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5575091

>>5575089
oh wait that's the jpeg version, but yeah it's hella cool too

>> No.5575127
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5575127

>>5574978

CMAAAAAAAAN PLEEEES, halp me give you zero latency cowwadoody.

>> No.5575164

This is a troll thread beyond a shadow of a doubt.

>> No.5575171
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5575171

>>5575164

thanks for bumping.

why is this a troll? I want to know whether you can force backward tunneling. And I don't have the equipment to experiment.

>> No.5575222

>>5575171

man, you bumped it off the front page. is there really not one guy who can answer this?

>> No.5575270
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5575270

Do you know the definition of insanity? Some guy told me the definition of insanity was doing the same thing over and over againand expecting a different outcome.

I thought he was bullshitting me. So I popped him in the head.

>> No.5575309
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5575309

>>5575270
But it turns out he was right. Everywhere I look, everywhere I go, I see myself doing the same thing, expecting something different to happen. This time it'll work. This time it'll work.


But it never does.

>> No.5575333
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5575333

lt is a fact that two opposing bio-etheric waves placed one over the other cancel each other out.

>> No.5575342
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5575342

can someone just please answer the moddafuggen question please, i'll do whatever you want me to do if that's your thing.

>> No.5575355
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5575355

>>5575333

yes, but what happens to the energy? all your touchy, feely plants and animals aren't helping!

>> No.5575356

http://lmgtfy.com/?q=energy+conservation+wave+interference&l=1

>> No.5575362

>>5575342

Never heard of a wave canceling out.... Maybe the wave goes into this lower state of energy.

>> No.5575383

>>5575356
>http://lmgtfy.com/?q=energy+conservation+wave+interference&l=1

except you're in a waveguide and this doesn't apply - and still doesn't explain where it happens, if it happens.

also, his answer for follow up 2 is false.

>>5575362
why would it do that? where would the difference go?

>> No.5575420

>>5575355
If I slap you with my right hand, you move left. With my left hand, you move right. With both hands, you stay still, but the force is still exerted.

>> No.5575436

>>5575420
the damage is absorbed by my skin and skull.
friction, thermal energy, as you squish my head. brain matter escapes radially.

>> No.5575439

>>5575420
if your analogy only applies in the quantum world in some convoluted way you gotta explain it to me more thoroughly please.

>> No.5575444

Look into nodes and anti-nodes. You can cause multiphasic cancellation, but somewhere else in "space" (dependent on phase angle and any reflection) there will be constructive alignment. You can't have precise directivity of a lightwave.

tl;dr: the energy goes somewhere else.

>> No.5575498
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5575498

>>5575444

>You can't have precise directivity of a lightwave.

sub wavelength waveguide

barring tunneling, but we are focused on the bulk of the beam, not some outliers. unless you're saying they will all tunnel for some unexplained reason.

>somewhere else in "space" (dependent on phase angle and any reflection) there will be constructive alignment

yeah but that would imply that you are retroactively changing the outcome of other locations. retrocausality is a thing, (see delayed choice quantum eraser) but the wave function needs to be collapsed at the further terminal, and the outcome cannot be altered, therefore no information can be relayed. but here you have a choice whether you collapse the wave function or not.

soo. what are you telling me. what are you predicting.

>> No.5575505

>>5575498

travelling back in time to make up for lost time.

>> No.5575527

The field carrying the energy returns to zero

>> No.5575534

>>5575527

so time travel is your final answer.

>> No.5575596
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5575596

one last salvage attempt today.

someone, anyone, out there, hear my call, tell me whether I can time travel, or where my photons are going.

also explain why if you would be so kind.

>> No.5578307

because niggers

>> No.5578730

Pretty good explanation:
http://van.physics.illinois.edu/qa/listing.php?id=1891

>> No.5578731

wavesex

>> No.5578796

>>5578730
>http://van.physics.illinois.edu/qa/listing.php?id=1891

quote:
> I tried to calculate it exactly but couldn't do the integrals.

they're basically predicting an excitation which results in a new light source at the point of annihilation.

that doesn't make any sense, but fuck it.