Diffraction Basics IV: Bragg's Law and Rotations

This lecture covers the detailed explanation of Bragg's law, focusing on the relationship between incident and scattered wavevectors, the concept of Q vector, and the rotation of the crystal to meet the Bragg condition. It also discusses rotations in real and reciprocal space, emphasizing the importance of aligning crystal planes for diffraction. The Ewald sphere is introduced as a key concept for achieving diffraction peaks. The instructor prepares the audience for the upcoming section.