(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An X Ray beam (wavelength 10^10m) is incident upon a sample of a powdered crystalline material. At a distance of 5m from the sample a flat detecting film has been placed. A pattern of 2 circles have been recorded on this film (radius 2cm and 3.5cm).

What crystal spacing does this pattern correspond to?

2. Relevant equations

I'm not sure but:

mλ = 2dsinθ

(The reason I am unsure as that is for solid crystals not powder)

3. The attempt at a solution

So far I ahve calculated the angles the circles are at to the beam:

tan θ = 2/5 so θ = 22 degrees

tan θ = 3.5/5 so θ = 35 degrees

Next I tried putting them both into the above equation trying to calculate d but that makes little sense to me.

Anyone able to help?

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# Homework Help: X-Ray Diffraction

Can you offer guidance or do you also need help?

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