Cryogenics is the study of extremely low temperatures. Electrodynamics analyses the relationship between electrical and magnetic forces. Fluid physics deals with the behavior and movements of liquids and gases. Geophysics is the study of earth and its atmosphere and waters by means of the principles of physics. Health physics involves the protection of people work with are near radiation.
Mathematical physics is the study of mathematical systems that stands for physical phenomena.
Mechanics deals with the behavior of objects and systems in response to various forces. Molecular physics examines the structure, properties, and behavior of molecules. Nuclear physics is concerned with the structure and properties of the atomic nucleus, and with nuclear reactions and their applications. Optics is the study of the nature and behavior of light. Particle physics , also called high energy physics, analyses the behavior and properties of elementary particles.