Physics is science that determines the living and life styles of the people. However, it has many misconceptions in the concepts. In this study, the effect of group work and traditional method in addressing the Class IX student’s misconceptions about light is investigated. The explanatory sequential mixed method was used for the study. It was carried out in one of the Middle Secondary School [MSS] under Trashigang district. The sample of this study consisted of 42 Class IX students and 5 science teachers. The data collection was done using multiple choice questions as pre-test and post-test with explanations. The semi-structured interview was conducted to support the quantitative findings. The data obtained indicated that the students in the experimental group were more successful in addressing the misconception of light concept than the control group. The independent t-test result showed the significant difference in terms of mean score p<0.05 in the post test result. The result obtained from the study rejects the null hypothesis. The findings confirm that the group work is effective in addressing the misconceptions of light comparing to traditional method of teaching and learning.