Longitudinal waves in the Universe / Sounds of the Sun

Discussion in 'Free Thoughts' started by river, Oct 13, 2018.

  1. river

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    So sound ,vibration(s) is carried into space by the Sun's plasma field ?
     
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  3. DaveC426913 Valued Senior Member

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    No.

    Plasma is not a field; it is matter. It stops at the top of the sun's atmosphere, as does any sound.
     
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  5. river

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    So doppler light wave theory , which is the transverse wave of light , is the same as the longitudinal wave of sound ? How so ?
     
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  7. DaveC426913 Valued Senior Member

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    No. I did not say that.


    We actually use a similar technology right here on Earth in covert surveillance.

    From a distant vantage point, we cannot hear the sounds of two people talking inside a closed office. What we can do though, is bounce a laser off the window. The laser is so sensitive, it can pick up the vibrations of the window, caused by the voice of the occupants. The shifts in the returned laser pulse can be processed, pulling out just the vibration in the human range.
    We can then play those human-level vibrations back from a speaker.

    So, we can read sound from a distant office building - without any sound travelling between it and us - by using laser light.
     
  8. river

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    So ........the Sun is not solid , it has fluid motion
     
  9. DaveC426913 Valued Senior Member

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    Definitely.
     
  10. river

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    Of which had a medium to travel with

    Okay but so what ? In relevance to the Sun
     
  11. DaveC426913 Valued Senior Member

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    18,959
    No. It traveled as light. Light is not a medium. Light can cross vacuum. Sound cannot.

    Simply that it's essentially the same technology.
     
  12. river

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    There is no actual " vacuum " in space . All space has something in it .
     
  13. DaveC426913 Valued Senior Member

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    Not something that an act as a medium for sound.

    Sound requires matter. Sound is the transmission of oscillations (compression, rarefaction of adjacent atoms).
    Sound requires matter of sufficient density that the atoms can interact with their neighbors in sufficient quantity to preserve oscillations.

    What few atoms there are in vacuum do not physically interact as a medium - they are way, way too rarefied to transmit oscillations between them.
     
  14. river

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    Sound requires a medium

    Explain more clearly , your idea , in your last statement .

    How so ?

    It is beyond atoms , it is sub-atomic , and into quantum .
     
  15. river

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    17,307
    So sound has a medium on which to travel , plasma , within the Sun
     
  16. DaveC426913 Valued Senior Member

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    18,959
    Yes.
    Sound is the movement of the medium. No medium, no sound.

    Well, it's not my idea. It's just physics.

    There are, at best, about 5 particles per cubic centimetre in interplanetary vacuum. Thst puts each atom several millimetres apart from its neighbor.

    Those particles are so far apart, they cannot physically interact except very occasionally and randomly - which means they cannot transmit a pulse.

    Contrast with air, where there are about a thousand billion billion atoms per square centimetre. Those atoms are about a nanometre apart. Close enough to interact.
    That's how dense atoms need to be packed to transmit sound.
     
  17. DaveC426913 Valued Senior Member

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    18,959
    Nothing about what we are discussing involves the subatomic realm.
     
  18. DaveC426913 Valued Senior Member

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    18,959
    Yes. Within the sun.
     
  19. river

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    True

    But the medium upon which sound waves manifest , could be sub-atomic .

    What is the density of sub-atomic particles and longitudeinal waves in space ?
     
  20. DaveC426913 Valued Senior Member

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    18,959
    It isn't.
    As stated, about 5 per cubic centimetre. That's atoms, electrons, neutrons and protons combined.

    By 'waves' you mean EMR.
    EMR is not a medium, and cannot transmit sound.
     
  21. river

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    Yet the sound of the Sun is detected
     
  22. DaveC426913 Valued Senior Member

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    18,959
    By the Doppler shift of light.
    By definition, that is not sound. Though it can detect sound in distant objects.
     
  23. DaveC426913 Valued Senior Member

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    18,959
    The hallmark of scientific study is to accept what the evidence is telling you, whether or not you like it.
    Otherwise, its dogma.
     

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