Objective: The following experiments may be performed with the help of this setup:

• Study of the dispersion relation for the mono-atomic lattice-Comparison with theory.

• Determination of the cut-off frequency of the mono-atomic lattice.

• Study of the dispersion relation for the di-atomic lattice – ‘acoustical mode’ and ‘optical mode’ energy gap. Comparison with theory.
  
  Theory: Lattice dynamics is an essential component of any postgraduate course in Physics, Engineering Physics, Electronic Engineering and Material Science. In particular it is essential for understanding the interaction of electromagnetic waves and crystalline solids.
  
  In present setup, mono-atomic and diatomic lattices are stimulated using the transmission line having ten identical sections of LC resonant circuit.
  
  The dispersion relation for electrical analogue of the mono-atomic lattice is                                                
  

                                                                       
and dispersion relation for electrical analogue of diatomic lattice is 

                                                           
With the help of the simple and user friendly setup the phase difference between the input and output wave is measured at different frequencies and tabulated as given below:

Then a graph of the experimental value and the theoretical value is plotted and compared. Lattice Dynamics Kit consists of the following parts: