Example: for an nacl crystal, the cell-edge a = 0.542 nm. the smallest angle at which bragg reflection can occur corresponds to a set of planes whose indices ar

Example: For an NaCl crystal, the cell-edge a = 0.542 nm. The smallest angle at which Bragg reflection can occur corresponds to a set of planes whose indices are (B) 110 (A) 100 (C) 111 (D) 200