WM2.1 Bragg Diffraction Using Microwaves

This is done in the lab. A styrofoam cube has 100 steel balls symmetrically placed to be like atoms of a cubic crystal. Using a microwave source and detector at different angles, Bragg diffraction can be seen on an oscilloscope attached to the detector. The answers can be compared to the theoretical value 2dsinA = nl, where A is the usual angle and l the wavelength.

Equipment Location: Above A