Nuclear physics is the field of physics that studies the behavior and interactions of atomic nuclei. This includes the structure and properties of atomic nuclei, the forces acting within them, and the processes of nuclear reactions, such as fission and fusion. Nuclear physics plays a crucial role in a variety of scientific and technological areas, including nuclear energy, nuclear weapons, and medical imaging. Researchers in nuclear physics study fundamental properties of matter, such as the strong and weak nuclear forces, as well as practical applications of nuclear technology.