Reflecting and limiting sphere in diffraction

[asdf1]

What is the purpose of the reflecting and limiting sphere in diffraction?

 

[OlderDan]

What is the purpose of the reflecting and limiting sphere in diffraction?

This may not be crystal clear, but maybe with what you already know it will get you going in the right direction. Obviously, you need to have a basic understanding of reciprocal space for this to make any sense at all.

http://www.eng.uc.edu/~gbeaucag/Classes/XRD/ReciprocalRoadMap.html

http://commons.wikimedia.org/wiki/Diffraction

 

[asdf1]

Understanding a little better, but it's still hard to picture things~