You give a number of equations related to the structure factor in chapter '14.2 Scattering Amplitudes'.
When asked to derive the structure factor, is it safe to just cite these equations or is there some kind of underlying definition from which one should start?
What is the definition of the structure factor and how do I show that this definition is the same as equation 14.5?
Examiners gave 8 points in the past for this derivation and I am unsure whether it is enough to just copy what you have written down in this chapter.
Thank you very much!