<b>Synthesis of Thin Film Ternary Chalcogenide Glasses and Study of its Optical Properties</b> In the present work, a systematic investigation of Tellurium based ternary chalcogenide semi conducting materials Se Te Ga has been undertaken. The system has been studied in detail with emphasis on the effect of Gallium in Se Te binary components. Bulk glasses of Se Te Ga systems and thin films are prepared by the conventional melt quenching technique and by thermal evaporation technique, respectively. The effect of compositional variation on some optical constant has been observed and discussed in the present investigation. 1359-1362 Issue-2 Volume-2 Vivek Kumar Dwivedi