International Science Community Association Research Journal of Physical Sciences 14 2 2026 08 4 Quantum Entanglement and the Nature of Reality: Philosophical Implications of Non-Locality and Observer Dependence 29 32 EN Yombouno Faya Maurice 1 Département de Physique. Université de N’Zérékoré, BP 50, N’Zérékoré. Guinée Bayo Ibrahima 2 Centre de Recherche Marine et Côtière, Conakry, Guinée Summy PéLououéa 3 Département de Gestion des Ressources Naturelles. Université de N’Zérékoré. BP 50, N’Zérékoré, Guinée Keita Oumar 4 Département d’Hydrologie. Université de N’Zérékoré. BP 50, N’Zérékoré, Guinée Agbazo Noukpo 5 Département d’Hydrologie. Université de N’Zérékoré. BP 50, N’Zérékoré, Guinée Agrawal Richa 1 Department of Physics, G. N. Khalsa College, Matunga, Mumbai, India Urs Bharathi Shettahalli Nagaraje 1 Department of Mathematics, Government Science College, Chitradurga, Karnataka, India Krishnamurthy Srikumar 2 Department of Mathematics, School of Engineering, Dayananda Sagar University, Bangalore, Karnataka, India Tiwari Saurabh Kumar 1 Department of Physics, Sri Ram Kumar Bhartiya Gyan Devi Mahavidhyalaya Phaphund, Auraiya, Uttar Pradesh, India Dubey Prakash 2 Department of Physics, Janta PG College Bakewar Etawah, Uttar Pradesh, India Saxena Nirupma 3 Department of Physics, Dayanand Brajendra Swarup College Govind Nagar, Kanpur, Uttar Pradesh, India Kumari Jyoti 1 Department of Physics, Veer Kunwar Singh University, Ara, Bihar, India > Research Article 2026 4 5 2026 08 4 Quantum entanglement presents one of the most striking departures from classical intuitions about the physical world. It reveals correlations between spatially separated particles that cannot be explained within the framework of local realism. Experimental violations of Bell's inequalities have firmly established that such correlations are not merely theoretical curiosities but reflect the structure of nature itself. At the same time, the observer-dependent aspects of quantum mechanics complicate the picture further, as the act of measurement appears to play an active role in determining outcomes. Together, these features raise important philosophical questions about the independence of physical systems, the nature of causality, and the status of objective reality. Various interpretations of quantum mechanics—such as the Copenhagen interpretation, Many-Worlds interpretation, and relational approaches—offer different ways of understanding these issues, yet none provides a universally accepted resolution. This paper examines how entanglement and observer dependence jointly challenge classical realism and suggests that reality may be better understood as relational, contextual, and fundamentally interconnected. Copyright@ International Science Community Association