Potassium chloride (KCl) is an ionic solid with a crystalline structure whose planes are 0.314 nm apart. X-rays of wavelength 0.267 nm are used in a Bragg diffraction experiment to study the crystalline structure. At what angle with respect to the atomic planes in the crystal would you expect the first strong reflection to -occur?

Potassium chloride (KCl) is an ionic solid with a crystalline structure whose planes are 0.314 nm apart. X-rays of wavelength 0.267 nm are used in a Bragg diffraction experiment to study the crystalline structure. At what angle with respect to the atomic planes in the crystal would you expect the first strong reflection to -occur?