???????Bragg’s law

The method developed by the Braggs (William and his son Lawrence, who later
jointly won the Nobel Prize) is the foundation of almost all modern work in X-ray
crystallography. They used a single crystal and a monochromatic beam of X-rays, and
rotated the crystal until a reflection was detected. There are many different sets of
planes in a crystal, so there are many angles at which a reflection occurs. The complete
set of data consists of the list of angles at which reflections are observed and their
intensities.

n_/|=2d sino       n=order ofdiffraction,_/|=wavelength of X-rays,d=distance btw two layers,o=angle of diffraction

 

W.H.Bragg proposed this equation obtain a relation btw _/\,n,d,o.

the thing which was posted as 0 in my previous post is actually theta

Braggs law;

It states that the extra distance travelled by a wave is directly proportional to the wavelenght

2dsin θ = nλ