STUDY OF DIFFUSION PROCESS IN SUCROSE SOLUTION BY USING DOUBLE EXPOSURE HOLOGRAPHIC INTERFEROMETRY (DEHI)

Holography is an interference method of recording the light waves diffracted by a subject illuminated with coherent light. Holographic interferometry is the most important and revolutionary application of holography. It is an extension of interferometric measurement technique in which at least one of the waves, which interfere, is reconstructured by hologram. It is concerned with the formation and interpretation of fringe patterns, which appear when a wave generated at some earlier time and stored in a hologram is later reconstructed by interfering with a comparison wave. The paper describes the use of holography in chemistry to study transport phenomena in transparent liquids. Diffusion is the movement of molecules due to their thermal energy under the influence of concentration gradient. we have employed DELHI technique for determining diffusion coefficient of 0.5 N sucrose solution. This technique resulted in producing good contrast fringes which are superior than reported earlier. The experimental results are compared with existing diffusion coefficient values and it is observed that there is good agreement with existing data.