Question

X-rays are used for the study of crystal structure because

Answer 1

Crystals are regular arrays of atoms, and X-rays can be considered waves of electromagnetic radiation. ... X-rays are used to produce the diffraction pattern because their wavelength λ is typically the same order of magnitude (1–100 angstroms) as the spacing d between planes in the crystal.

Answer 2

we know that the crystals which are found inside the earth crust is not lustrous means brigher.so , x Ray is emitted into the crystal and the phenomenon of refraction takes place ,this makes crystal brighter.