1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Dirac Delta Function

  1. Oct 13, 2013 #1
    What does the Dirac Delta Function do?


    How do you evaluate it?

    What are its values from -inf to +inf?
  2. jcsd
  3. Oct 13, 2013 #2
    Did google yield no useful results?
  4. Oct 13, 2013 #3
    It did not explain the vector r
  5. Oct 13, 2013 #4
    The vector just means that it is a function of x, y, and z.

    Beyond that, I would say that you should try a bit harder to learn about the delta function without just asking us to explain it. It is typically introduced in either a Quantum mechanics course or an Electromagnetism course. Griffiths text on both subjects gives a non rigorous intro to the delta function.
  6. Oct 13, 2013 #5
    So are you familiar with the 1-dimensional Dirac delta function? If so, the 3-dimensional delta function is just the product of three 1-dimensional delta functions, one for each component of the vector ##\vec{r}##:

    ##\delta^3(\vec{r}) = \delta(r_x)\delta(r_y)\delta(r_z)##
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook