Question

what is bragg's diffraction law and explain the structure of NaCl and KCl​

Answer 1

Answer:

In physics, Bragg's law, or Wulff–Bragg's condition, a special case of Laue diffraction, gives the angles for coherent and incoherent scattering from a crystal lattice. When X-rays are incident on an atom, they make the electronic cloud move, as does any electromagnetic wave. The movement of these charges re-radiates waves with the same frequency, blurred slightly due to a variety of effects; this phenomenon is known as Rayleigh scattering (or elastic scattering). The scattered waves can themselves be scattered but this secondary scattering is assumed to be negligible.

A similar process occurs upon scattering neutron waves from the nuclei or by a coherent spin interaction with an unpaired electron. These re-emitted wave fields interfere with each other either constructively or destructively (overlapping waves either add up together to produce stronger peaks or are subtracted from each other to some degree), producing a diffraction pattern on a detector or film. The resulting wave interference pattern is the basis of diffraction analysis. This analysis is called Bragg diffraction.

Answer 2

Answer:

• According to Brag's Law, the X-angle ray's of incidence,, will reflect with the same angle of scattering,, when it strikes a crystal surface.
• Additionally, constructive interference will happen when the path difference, d, is equal to n wavelengths, where n is a whole number.

Explanation:

Structure of NaCl:

• NaCl has a face-centered cubic crystalline structure and a cubic crystal system.
• Four cations and four anions make up a face-centered cubic unit cell of sodium chloride.
• The number of NaCl units in a unit cell of NaCl is four because there are four atoms or ions in each unit cell of a face-centered cubic structure.

Structure of KCl:

• Due to the presence of one potassium atom in the linear and four corners with four lone pairs of electrons,the KCl molecule has a linear geometry shape.
• The KCl molecular geometry contains one K-Cl single bond.

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