Question

Lattice planes which are introduced with Bragg’s Law are defined from which of the following factors?

(a) Shape and concentration of the crystal

(b) Solubility and concentration of the crystal

(c) Number of unit cell present in the crystal

(d) Shape and dimensions of the unit cell of the crystal

I got this question in exam.

I need to ask this question from Definitions topic in division X-Ray Diffraction of Solid State Chemistry

Answer 1

Right choice is (d) Shape and dimensions of the unit cell of the crystal

Explanation: Bragg’s Law is used to introduce the lattice planes which are defined purely from the shape and the dimensions of the unit cell. Lattice planes are entirely imaginary and simply provide a reference grid to which the atoms in the crystal structure may be referred.