Instrument Comprise of an audio oscillator with amplitude control and facility to vary the frequency from 1 Hz to 100 KHz. It has built in set up to match the impedance of simulated lattice. Another part of Lattice Dynamic Kit consists of transmission line, which simulates one-dimensional mono-atomic and di-atomic lattices. Additional equipment required is CRO or DSO.
Experimental Objective
VASHISHAT Lattice Dynamics Kit is designed to Study the Dispersion relation for Mono atomic Lattice.
Determination of the Cut-off frequency and Comparison with theory.
Study of the Dispersion relation for the Di-atomic Lattice, Acoustical mode and Energy Gap.
Theory
Lattice dynamics is a crucial aspect of postgraduate studies in Physics, Engineering Physics, Electronic Engineering, and Material Science, particularly for understanding electromagnetic wave interactions with crystalline solids. However, students often struggle to grasp complex concepts like Acoustical Mode, Optical Mode, and Energy Gap, as they cannot be directly observed in a laboratory setting. To overcome this challenge, a laboratory exercise can be introduced, where students follow a structured procedure to explore a simplified model of the system, verifying established theories and gaining insight into the concepts. The Lattice Dynamics Kit offers a hands-on experience for studying mono and di-atomic lattices, providing a valuable learning opportunity.
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