SCOPE OF PHYSICS AND EXCITMENT

We can get some idea of the scope of physics by looking at its various sub-disciplines.Basically by there are two domains of interest :macroscopic domain  and microscopic.The macroscopic domain includes phenomena at the laboratory,terrestrial and astronomical scales.The microscopic domain includes atomic,molecular and nuclear phenomena CLASSICAL PHYSICS deals mainly with macroscopic phenomena and includes subjects like MECHANICS ELECTRODYNAMICS ,OPTIC and THERMODYNAMICS. Mechanics founded on newtons laws of motion and the law of gravitation is concerned with the motion for equilibrium of particles rigid and deformable bodies,and general systems of particles .

The propulsion of rocket by a jet of ejecting gases, propagation of water waves or sound waves in air.The equilibrium of a bent for rod under load are problems of mechanics .Electrodynamics deals with electric and magnetic phenomena associated with charged and magnetic bodies its basic laws were given by Coulombs,Oersted ,Ampere and Faraday , and encapsulated by Maxwell in his famous set of equations.The motion of a current -carrying conductor in a magnetic field ,the response of a circuit to an alternate current voltage (signals),the working of an antenna ,the propagation of radio waves in the ionosphere,are problems  of electrodynamics .Optics deals with the phenomena involving light.The working of telescopes and microscopes ,colours exhibited by thin films.are topics in optics Thermodynamics in contrast to mechanics does not deal with the motion of bodies as a whole Rather,it was systems in macroscopic equilibrium and is concerned with changes in internal energy.temperature,entropy.

The efficiency of heat engines and refrigerators and direction of physical or chemical process are problems of interest in thermodynamics the microscopic domain of physics deals with the constitution and structure of matter at the minute scales of atoms and nuclei and there interaction with different probes such as electrons ,photons and other elementary particles.