Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Notation help? (don't understand)

  1. Feb 25, 2015 #1
    i might have been spelling them wrong, but i can't find what do they mean:
    what's the difference between [psi](x) and [psi tilda](x)? i mean this thingy.. (~)

    and what's h(bar)? (in the formular p=h(bar)k) [i mean the bar thing]

    and other stuff.. things that i need to know...?
    i'm new to the mathematics side of physics, and it's quantum is where is started...
    if the order was bad, which order should i learn in? (the only other math i've done is in special...)

    and if there are more common notations that i need to know please tell me, thankyou
  2. jcsd
  3. Feb 25, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    ##\tilde\psi## isn't a standard notation, so you will have to look for a definition in the book where you found it. If there isn't one, then maybe it's just an arbitrary function.

    ##\hbar## is called the reduced Planck constant. It's defined by ##\hbar=\frac{h}{2\pi}##, where ##h## is Planck's constant.

    Most notations should be defined in your book. What book are you using?
  4. Feb 25, 2015 #3
    it's hard to search for stuff when it is not in the keyboard!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook