Preface

The Fundamentals of Sustainable Development Goals (SDGs)"Physics provides the conceptual foundations, quantitative methods, and experimental tools required to understand natural phenomena and develop reliable responses to contemporary challenges.From advanced materials and energy conversion to medical imaging, environmental monitoring, and space science, progress in physics continues to shape the technologies and evidence that support sustainable development.The 15th International Physics Seminar 2026 (IPS 2026) is organized to strengthen this connection between fundamental knowledge, scientific innovation, and societal needs.This proceedings volume reflects the scientific breadth of IPS 2026 and the conference commitment to rigorous, relevant, and collaborative research.The contributions examine fundamental questions, experimental approaches, computational techniques, and applied technologies across major areas of physics.Together, they demonstrate that physics is not only a discipline concerned with the laws of nature, but also a central source of methods and solutions for achieving resilient infrastructure, responsible energy systems, improved health technologies, environmental protection, and high-quality scientific education.IPS 2026 also serves as a forum for connecting researchers at different career stages.Academics, scientists, lecturers, students, postgraduate students, engineers, and practitioners are invited to exchange findings, evaluate emerging directions, and establish research partnerships.Through keynote lectures, scientific presentations, and parallel sessions, the conference encourages participants to move beyond isolated disciplinary discussions and to identify shared questions that can be addressed through theory, experiment, computation, instrumentation, and interdisciplinary collaboration.