Question 5. Each set of Bragg planes can be referred to systematically by "Miller Indices" that indicate the way in which the Bragg planes cut the unit cell. Miller indices are a group of three numbers (h,k,l) that describe the number of times the x,y and z axes of the unit cell are cut by the planes. (This is a convenient system because it means we are using whole numbers to describe the set of Bragg planes.)

What are the Miller indices for the families of planes seen in the images below?

(a) (b) y Y y