X-Rays of Wavelength 0

Multiple Choice

X-rays of wavelength 0.080 nm are used in a Bragg scattering experiment with a crystal. If the first-order maximum is found at an incident angle of 6.0° relative to the crystal surface, what is the plane spacing in the crystal?

A) 0.31 nm
B) 0.71 nm
C) 1.4 nm
D) 0.38 nm
E) 0.77 nm