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Hi, I was just wondering

  1. Oct 30, 2003 #1
    If False the same as Not true?

    Undoubtendly, this is a question in Quantum Mechanics which was why I put it up here and not a Philosophical Question though it may sound like one...


    Sridhar
     
  2. jcsd
  3. Oct 30, 2003 #2
    do you have any reason to believe otherwise.
    we even have the notation for it.

    p-truth
    ~p- not truth- false.
     
  4. Oct 30, 2003 #3
    ...

    I was just thinking if not true does not completely coincide with false. False is a "perfect" statement isn't it??? Which means u are totally avoiding it.

    Sridhar
     
  5. Oct 30, 2003 #4

    jcsd

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    It is well known that p ≡ ~(~p). Though what has this got to do with quantum mechanics?
     
  6. Oct 30, 2003 #5

    jcsd

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    Also I should add that a statement is only a statement if it can either be false or true, it is not a statement if it is not either (law of excluded middle)
     
    Last edited: Oct 30, 2003
  7. Oct 30, 2003 #6
    so the statement "im a liar" isnt a statement?
     
  8. Oct 30, 2003 #7
    ...

    Can u give me a statement on whether an electron is a particle or a wave. You shoudn't say both.....

    Sridhar
     
  9. Oct 30, 2003 #8

    jcsd

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    No, because it can be true or false without contradiction. However a statemnt should not reference itself i.e.: "this statemnet is false".
     
  10. Oct 30, 2003 #9

    jcsd

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    Re: ...

    p: An electron is a particle

    is true

    q: An electron exhibit wavelike properties

    is also true
     
  11. Oct 30, 2003 #10
    Haven't u read abt Feynman's Statement about an Electron on whether it is a particle/wave "It is like neither"


    Sridhar
     
  12. Oct 30, 2003 #11

    jcsd

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    It depends on how you define the concepts of particles and waves, an electron is classified as a particle.
     
  13. Oct 30, 2003 #12

    jcsd

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    What Feynman was really talking about were the classical concepts of 'wave' and 'particle', which we know the electron does not follow.
     
  14. Oct 30, 2003 #13
    However the statement is Equivalent....
     
  15. Oct 31, 2003 #14

    jcsd

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    equivalent to whatm (also note that the wavefunction of an electron is not the same thing as the electron)? Basically: firstly you need to define the parameters of membership for the set of all particles and the set of all waves; depending on how you define these sets you might find that the electron is an element in both, one or neither. If you decide to define them as mutually exclusive yet you find that the elctron should be a member of both, there is a flaw in your defintion, not in logic.
     
  16. Oct 31, 2003 #15
    Agreed.. but, the wave packet explanation of an electron obeys both the wave and particle properties.

    What do u have to say abt this?

    Sridhar
     
  17. Oct 31, 2003 #16

    jcsd

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    You can't really call a single elctron a wave but wave-like behviour is certainlyu exhibited over many elctrons as a result of the wavefunction.
     
  18. Oct 31, 2003 #17
    Re: Re: ...


    Show me the truth?..When is a Particle TRUELY like an Electron

    When are the properties of an Electron Wavelike?
     
  19. Oct 31, 2003 #18

    jcsd

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    Re: Re: Re: ...

    An electron is always an electron, but it does show some wavelike propetires for example it's distribution in the two-slit experiment.
     
  20. Oct 31, 2003 #19
    Re: Re: Re: Re: ...

    Give me an Example of Electron being a true Electron 'Particle'.

    Now give me the same Electron in the same configuration, showing me its 'Wavelike' properties.
     
  21. Nov 3, 2003 #20

    turin

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    Well said. They seem to be ignoring this.
     
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