The half-wave loss of light has an important efleet on the intererence pattern.Taking [loyd mirrorinterferenee and Newton ring equal-thickness interference as examples , the direetion of the electrie veetor of therelleeted light at the dieleetrie separation interface is explored, and the phenomenon of half-wave loss occurringin the interference device is analyzed. Based on the Python language, the fringe patterns of lloyd mirrorinterferenee and Newton ring equal-thiekness interferenee under different conditions are simulated , and theelfeet of the presenee or absenee of half-.wave loss on the interference fringes is demonstrated comparatively ina Newton ring device. The integration of computer programming language into theoretieal and experimentalteaching,and the visualization of theoretical formulas and experimental data can help to improve the teachingelfeet , deepen students’ understanding of the basie principles,and stimulate their innovative thinking.