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Three Feynmans walk into a bar

  1. Jul 27, 2006 #1
    The first two vanish into the back room to play a game of darts,
    leaving the third to chat up the barmaid. After emptying a stein, he
    pulls a bit of ribbon from his pocket and entertains her with a trick
    whereby he ties the ribbon to the handle, twists the stein around two
    full turns, and then magically untwists the ribbon without moving the
    stein. He tells her how particles he studies have a property called
    "spin", and that particles whose spin is 1/2 actually behave like the
    stein with the ribbon tied to it: coming back where they started only
    after two, but not one, full turns. Feynman then leans closer, and
    conspiratorially whispers to her why (in language a barmaid can
    understand), just spin 1/2 particles act this way, and not other
    particles.

    What story does the Feynman tell the barmaid?
     
  2. jcsd
  3. Jul 29, 2006 #2
    Edward Green wrote:

    > The first two vanish into the back room to play a game of darts,
    > leaving the third to chat up the barmaid. After emptying a stein, he
    > pulls a bit of ribbon from his pocket and entertains her with a trick
    > whereby he ties the ribbon to the handle, twists the stein around two
    > full turns, and then magically untwists the ribbon without moving the
    > stein. He tells her how particles he studies have a property called
    > "spin", and that particles whose spin is 1/2 actually behave like the
    > stein with the ribbon tied to it: coming back where they started only
    > after two, but not one, full turns. Feynman then leans closer, and
    > conspiratorially whispers to her why (in language a barmaid can
    > understand), just spin 1/2 particles act this way, and not other
    > particles.
    >
    > What story does the Feynman tell the barmaid?


    Ah ha he tells her : The trick is one of the other Feynmans sneaks out of
    the back room and untwist the ribbon when she isn't looking. The quantum
    particles are not spinning so calling this property spin is also a trick."

    This makes the barmaid think "All physics is crap. But hey those guys make
    plenty of money. Right?"

    --
    You do realize.....
     
  4. Jul 29, 2006 #3
    Edward Green wrote:
    > The first two vanish into the back room to play a game of darts,
    > leaving the third to chat up the barmaid. After emptying a stein, he
    > pulls a bit of ribbon from his pocket and entertains her with a trick
    > whereby he ties the ribbon to the handle, twists the stein around two
    > full turns, and then magically untwists the ribbon without moving the
    > stein. He tells her how particles he studies have a property called
    > "spin", and that particles whose spin is 1/2 actually behave like the
    > stein with the ribbon tied to it: coming back where they started only
    > after two, but not one, full turns. Feynman then leans closer, and
    > conspiratorially whispers to her why (in language a barmaid can
    > understand), just spin 1/2 particles act this way, and not other
    > particles.
    >
    > What story does the Feynman tell the barmaid?


    A spin as described where the Feynman theorest is the only allowed
    answered is a quite simple story.

    "A spin to the stein takes the steinist out of all."

    A story where the particle never quite entertains the state in
    question. A transverse.

    Why spin 1/2 exists is the stein. A large effect making the surface the
    particle as opposed to the geometric center. Causing all dilemma to
    vanish. Gravity all.
     
  5. Jul 29, 2006 #4
    He gives her his telephone number & map to his home... "See you after work dear lass." :tongue2:
     
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