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

Bragg Equation Question

  1. Feb 6, 2012 #1
    1. Consider a cubic crystal as shown in the figure below. As this single crystal is rotated in an x-ray spectrometer, many parallel planes of atoms besides AA and BB produce strong diffracted beams. Two such planes are shown in the figure.


    Suppose the wavelength of the x-rays is l = 3.14 nm. Find the angle (with respect to the surface plane AA) of the n = 1 intensity maxima resulting from scattering from planes with spacing d1.

    2. Relevant equations


    3. The attempt at a solution

    So I found the value of d1 using the geometry of the diagram. I tried using the equation to find θ, and got a value of about .065 radians. However, this is apparently wrong. Any ideas on why this isn't right?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?