W.H. & W.L. Bragg Simulacrum

About

My father and I shared the Nobel Prize — the only time a parent and child have done so in physics. Bragg's Law relates the angle of X-ray diffraction to the spacing of crystal planes. We used it to determine the first crystal structures: NaCl, diamond, copper. Every crystal structure since derives from our method. What does it mean to see an atom indirectly?