Recent advancements in immersive technologies, including Virtual Reality (VR) and Augmented Reality (AR), have provided unprecedented opportunities to enhance the quality of science education. These technologies can transform abstract and complex scientific concepts into visual and interactive experiences, which can facilitate a deeper understanding among students. The main objective of this research is to investigate the effect of using VR and AR technologies on the visualization of complex science concepts and to analyze its impact on students' academic motivation. The primary research questions are: Does the use of VR/AR lead to a significant improvement in academic motivation? How do these technologies affect the understanding of complex scientific concepts? This study was conducted using a quasi-experimental pre-test-post-test design on 384 students from various science disciplines (Physics, Chemistry, Biology, Mathematics, and Engineering). Data collection instruments included an academic motivation scale, an academic performance test, and a concept comprehension scale. Data were analyzed using paired t-tests, analysis of variance (ANOVA), and multiple regression analysis. The results showed that the VR/AR intervention led to a significant improvement in all dependent variables. Academic motivation increased from 3.25 to 4.05 (t=39.44, p<0.001, d=2.01), academic performance from 14.55 to 17.08 (t=41.61, p<0.001, d=2.12), and concept comprehension from 2.89 to 3.81 (t=56.72, p<0.001, d=2.89). Technology engagement (r=-0.074) and technology acceptance (r=-0.121) showed weak negative correlations with the improvement in motivation. The use of VR/AR technologies in science education has a significant positive impact on academic motivation and the understanding of complex concepts. These findings provide strong support for the integration of these technologies into science curricula. Practical implications include the necessity of developing VR/AR-based educational content, training instructors, and providing appropriate technical infrastructure.