Assertion: Crystalline solids can cause X-rays to diffract.
Reason: Interatomic distance in crystalline solids is of the order of `0.1nm`.

Options

A. (a) If both the assertion and reason are true and reason explains the assertion assertion.
B. (b) If both assertion and reason are true but reason does not explain the assertion
C. (c) If assertion is true but reason is false.
D. (d) If assertion is false but reason is true.

Answer

A

Explanation

X-ray crystallography is a technique in which the pattern produced by the diffraction of X-rays through the closed spaced lattice of atoms in a crystal is recorded and then analyzed to reveal the nature of that lattice. The spacing in the crystal lattice can be determined using Bragg's law. The regular spacing of the atoms in crystal is of the order of wavelength of X-rays `(0.1mm)` because of which X-rays are diffracted from the crystals.