Bragg

Definition

Bragg's Law describes the condition for constructive interference of X-rays scattered by a crystal lattice. It is given by the equation $n\lambda = 2d\sin(\theta)$, where $n$ is an integer, $\lambda$ is the wavelength of the X-ray, $d$ is the distance between crystal planes, and $\theta$ is the angle of incidence.

5 Must Know Facts For Your Next Test

1. Bragg's Law explains how X-ray diffraction patterns are used to determine crystal structures.
2. The law relates the wavelength of incident X-rays to the angle at which they are diffracted by atomic planes in a crystal.
3. When constructive interference occurs, it results in intense spots known as Bragg peaks on a diffraction pattern.
4. The integer $n$ represents the order of reflection and can take values 1, 2, 3, etc., indicating multiple wavelengths fitting into one path difference.
5. Bragg's Law is fundamental to techniques such as X-ray crystallography, which helps identify atomic and molecular structures.

Related terms

X-ray Crystallography: A technique used to determine the atomic and molecular structure of a crystal by measuring how X-rays diffract upon hitting it.

Constructive Interference: Occurs when two or more waves combine to produce a wave with larger amplitude; essential for understanding Bragg peaks.

Diffraction Pattern:

The array of spots obtained when waves, such as X-rays, pass through a crystalline material and interfere constructively and destructively.