Chapter 11.3, Problem 2CP

Interpretation Introduction

Interpretation:

The angle at which the X-rays of wavelength 0.154 nm get reflected from a crystal is to be calculated.

Concept Introduction:

Bragg’s law is the fundamental law of X-ray crystallography, where a beam of X-ray of a particular wavelength enters a crystal lattice and the relation is represented as follows:

$n\lambda =2d\times \mathrm{Sin}\theta$

Here, $n$ is any integer, $\lambda$ is the wavelength of light, and $\text{θ}$ is the angle of incidence.

The angle of incidence is equal to the angle of reflection when a beam of rays enters the crystal lattice and a constructive interference occurs.

The structures of crystal and molecules are explained using Bragg’s law that are studied via X-ray diffraction technique.