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!

Homework Help: Can you tell me how to prove it?

  1. Jan 27, 2010 #1
    can you tell me how to prove the second formula according to the first formula in the attachment?
     

    Attached Files:

    • 1.jpg
      1.jpg
      File size:
      3.9 KB
      Views:
      114
    • 222.jpg
      222.jpg
      File size:
      5.1 KB
      Views:
      115
  2. jcsd
  3. Jan 27, 2010 #2
    In the exponential of the first formula, rewrite the dot product in terms of things you know (magnitudes and angles) by picking/defining your q-vector to be along the z-hat direction. After that, write the measure in spherical coordinates and run with it.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook