Two Planes of Atoms in a Crystal Are Separated by 3.25

Multiple Choice

Two planes of atoms in a crystal are separated by 3.25 × 10^-10 m. Light of what wavelength would show constructive interference at an angle of 17.5 degrees relative to the crystal surface?

A) 3.9 × 10^-10 m
B) 4.9 × 10^-9 m
C) 9.75 × 10^-10 m
D) 1.46 × 10^-10 m
E) 1.95 × 10^-10 m