[Xray reflection 1. The problem statement, all variables and given/known data X-rays of 1.54 angstroms are reflected off copper powder @ 21.65º 25.21º 37.06º 44.96º 47.58º Find the cubic lattice and the length of an edge of the unit cell. 2. Relevant equations nλ = 2d sin(Θ) ; the Bragg equation 3. The attempt at a solution The cubic latice is face centered at d110? Because it has 5 planes of reflection? I tried plotting sin(Θ) vs. n to get the slope and calculate a, but it doesn't seem right? How do I find the length of an edge of the unit cell and what is the cubic lattice?