Physics Help Forum Sound Waves and String Theory.

 Waves and Sound Waves and Sound Physics Help Forum

 Apr 28th 2018, 07:20 AM #1 Senior Member     Join Date: Feb 2017 Posts: 205 Sound Waves and String Theory. Is the basic idea of string theory that all particles are tiny vibrating strings inspired from sonic boom? A sonic boom is the sound associated with the shock waves created whenever an object traveling through the air travels faster than the speed of sound. Sonic booms generate significant amounts of sound energy, sounding similar to an explosion or a thunderclap to the human ear. So since sound is a vibration and the aircraft vibrates at sonic boom. Is this what inspired string theory? Since the aircraft can be viewed as a vibrating string of particles in string theory. So if the particles vibrate then they must be moving in the empty space within the object. So since the aircraft is made up of strings these can vibrate at high velocity at sonic boom. But one inference can be made here if we observe sound waves. 1. Sound is a vibration. 2. Sound waves require a medium. So if this is applied to string theory then: 1. All particles contain the vibration and contain an ultrasonic sound or so of a very high frequency. 2. The particles vibrate and require a medium. This medium could be the empty space between an electron and the nucleus. Last edited by avito009; Apr 28th 2018 at 07:26 AM.
 Apr 28th 2018, 09:11 AM #2 Senior Member     Join Date: Feb 2017 Posts: 205 Clarification. Also it could be this way: The particles vibrate and produce sound but the space between the nucleus and the electrons is a vacuum and sound requires a medium to travel so we dont hear the sound. If the particles are strings.
 Apr 28th 2018, 09:25 AM #3 Forum Admin     Join Date: Apr 2008 Location: On the dance floor, baby! Posts: 2,818 I'm afraid it isn't. But you have a more or less decent example of what might happen Classically if we could model it on a string. But there are a couple of reasons why this inspiration wouldn't work well... Particles vibrating on a string are not vibrating in a medium, such as air. It kind of screws things up. Still you are talking about inspiration so that certainly isn't a fatal flaw. As far as I know the inspiration is based on the idea that no theory, including Quantum Mechanics, can handle a point particle. We don't have to worry about this in String Theory as the particles have a finite, if incredibly small, size. The derivation of the string rules is very simple in concept (but Mathematically hideous from a Physics standpoint.) If there is any other reason for the inspiration I don't know of it. -Dan __________________ Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup. See the forum rules here.
 Apr 29th 2018, 10:27 AM #4 Senior Member     Join Date: Jun 2016 Location: England Posts: 1,011 I don't know this for certain, but I had always assumed the original inspiration behind string theory would be musical. One feature of vibrating strings is that they naturally feature fixed modes. They will vibrate only in certain defined ways at certain defined frequencies. This allows the possibility that the observed differences between quantum entities, could be related to the different vibrational modes available to these quantum strings. I personally am beginning to feel that, with the amount of time and effort that has been poured into this idea, one might have expected a breakthrough by now, if the breakthrough were there to find... __________________ ~\o/~
Apr 29th 2018, 01:38 PM   #5

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 Originally Posted by Woody I personally am beginning to feel that, with the amount of time and effort that has been poured into this idea, one might have expected a breakthrough by now, if the breakthrough were there to find...
If you are referring to String Theory then there have been breakthroughs... In the theory. Very little can be tested at this point: it is making predictions we just don't have sensitive enough equipment for to do the actual experiments.

-Dan
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 Mar 13th 2019, 12:24 AM #6 Junior Member   Join Date: Mar 2019 Posts: 5 According to string theory, absolutely everything in the universe—all of the particles that make up matter and forces—is comprised of tiny vibrating fundamental strings. Moreover, every one of these strings is identical. The only difference between one string and another, whether it's a heavy particle that is part of an atom or a massless particle that carries light, is its resonant pattern, or how it vibrates. __________________ mechanical design
 Mar 13th 2019, 07:42 AM #7 Physics Team     Join Date: Jun 2010 Location: Morristown, NJ USA Posts: 2,352 The "inspiration" for string theory came about when it was noticed in the late 60's that phenomena associated with the strong nuclear force seemed to follow the mathematics of Euler's beta function, though at the time no one knew why that should be (i.e. they had a formula in search of a theory as to why it should work), and then in 1970 some physicists realized the physics of vibrating strings can also be described by the beta function. So voila - maybe the strong nuclear force (and by extension the other forces and fundamental particles) are actually incredibly small vibrating strings. And fundamental characteristics of particles such as mass, charge, and spin are manifestations of the resonances of the vibrating strings. topsquark and Woody like this. Last edited by ChipB; Mar 13th 2019 at 09:35 AM.
 Mar 13th 2019, 10:07 AM #8 Senior Member     Join Date: Jun 2016 Location: England Posts: 1,011 Is this another of those situations where a mathematical similarity leads to an analogy with macroscopic phenomena, which can actually be deeply misleading and cause considerable confusion in the "lay" person. Where any vague inkling of possible understanding based on the analogy, is probably very wrong. viditt likes this. __________________ ~\o/~
 Apr 7th 2019, 10:39 PM #9 Junior Member   Join Date: Apr 2019 Location: Oregon,US Posts: 11 To begin with, string theory is not verified yet.We havent noticed any of its predictions on experiments.Second string theory describes the quantum world and sound waves are a macroscopic event . You cant expect to somehow connect the principle of sound waves and the string theory.
Apr 7th 2019, 11:49 PM   #10

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 Originally Posted by Woody Is this another of those situations where a mathematical similarity leads to an analogy with macroscopic phenomena, which can actually be deeply misleading and cause considerable confusion in the "lay" person. Where any vague inkling of possible understanding based on the analogy, is probably very wrong.
 Originally Posted by CaptainMarvel199 To begin with, string theory is not verified yet.We havent noticed any of its predictions on experiments.Second string theory describes the quantum world and sound waves are a macroscopic event . You cant expect to somehow connect the principle of sound waves and the string theory.
There are similarities but the concepts are applied somewhat differently. I haven't been able to dig much into String theory (after some 20 years of trying to gear myself up Mathematically!) but I have a little.

If anyone knows different please feel free to correct me.

The vibrations are indeed based on either a sound or optical framework, but as in QFT, these vibrations don't stretch for anything but a microscopic "length" of the string: As in deriving operators in QFT the vibrations are located at a point on a 10D manifold, known as a "brane," and to work with it we need a construct that connects those points. This, in Math-speak, is known as a connection which brings in all sorts of thoughts of non-Euclidean geometry. This sounds pretty arcane but conceptually it actually isn't. We run into similar problems when dealing with vibrations on a real (macroscopic) string such as a wire that has varying density along its length.

So it is a similar concept, though the Mathematical application is far more complicated in String theory.

-Dan
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