Diffraction peaks are expected for the $(110),(200),$ and $(211)$ planes in a BCC metal, such as iron.

What would be the expected $2$ peak locations, in degrees, for these three planes if iron has a

lattice constant of $0\mathrm{.}2866$ nm $?$ Assume $n=1$ and the monochromatic radiation has a wavelength

of $0\mathrm{.}1542$ nm $.(6$ points$)$