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!

Braggs law to work out interplanar spacing d

  1. Dec 5, 2009 #1
    hi, ive been bashing my head against the wall for the past few days trying to work this one out!!!
    ive worked out a de broglie wavelength of electrons accelerated from rest by a voltage of 100v to be around (1.23 x 10 ^-10) m.
    now using a KCl diffraction , these electrons cause a first diffraction peak at angle of 11.3 degrees.......so therefore what is the interplanar spacing of the KCl???????

    im pretty sure the braggs formula has got to be implemented but unsure how??it couldnt be as simple as rearranging the bragg formula to get the d vaule could it?

    2 d sin theta = n lambda

    so basic info is that electrons are accelrated by 100v from rest
    de broglie wavelength is (1.23 x 10 ^-10) m
    and the first diffraction peak is at 11.3 degree angle

    please, would apreciate ur ideas and help!!!
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted

Similar Discussions: Braggs law to work out interplanar spacing d
  1. Interplanar spacing (Replies: 1)