This book contains the proceedings of the 4th National Conference on Frontiers in Modern Physics (NCFMP 2024) and presents a curated collection of peer-reviewed research contributions highlighting recent advances and emerging trends in modern physics. The volume covers a broad spectrum of topics-including condensed matter physics, particle physics, biophysics, theoretical nanoscience, materials science, plasma physics, biomedical instrumentation, electronics, and applied electronics. The proceedings showcase both fundamental discoveries and innovative applications. The book serves as a comprehensive reference that provides a timely overview of contemporary developments in physics and demonstrates their growing impact on science, engineering, and technology.