WHAT ARE BRANCHES OF PHYSICS? 1. NUCLEAR PHYSICS This branch of physics is concerned with atomic nuclei. Nuclear physics is related to neutrons and protons which form the nuclei of atom called nucleons, their structure, energy state, reaction between nuclei and radioactivity, for example, nuclear fusion, nuclear fission and nuclear forces. 2. PARTICLE PHYSICS IT is that imporotant branch of physics which is deals with the ultimate particles of which the matter is compossd iff, Particle physics is related with understanding the properties and behaviour of elementary particles. 3. RELATIVISTIC MECHANICS It is that branch of physics which deals with velocities approaching that of light. Relativistic mechanics is concerned with the elementary particles related to special theory of relativity and describe motion of particles having velocities close of light. 4. SOLID STATE PHYSICS It is that branch which deals with structure and properties of solids. and phenomena