Abstract: A virtual simulation system including seven modules has developed for the experiment of Bi-prism interference: principle elaboration, effect demonstration, introduction of experimental content, introduction of experimental instrument, experimental instrument placement, experimental data measurement, and analysis of experimental results. In the development of simulation system, the self-adaptive image size display model based on center alignment is proposed; and the local area interaction model with the center of experimental instrument as the center has been proposed. This system realizes the function of adjusting the position of experimental instrument by dragging the mouse and the color simulation of interference phenomenon. Through the background calculation, the system judges the rationality of the user operation and gives the corresponding user operation prompt. The simulation system is complete in content, realistic in experimental phenomena, simple, and friendly in user interaction. The experiment can provide effective assistance to the theory and experiment teaching of bi-prism interference.

Key words: bi-prism interference experiment, virtual simulation, local area interaction