It is often said that physics is the study of matter and energy and the changes which take place. It is important to know how matter and energy are related to each other, and what changes they make and through space.
Physicists is of two types.
Experimental physicists and Theoretical physicists.
Experimental Physicists:-
Experimental physicists design and run careful investigations on a broad range of phenomena in nature, often under conditions which are a typical of our everyday lives. They may, for example, investigate what happens to the electrical properties of materials at temperatures very near absolute zero (-273 °C) or measure the characteristics of energy emitted by very hot gases.
Theoretical physicists:-
Theoretical physicists propose and develop models and theories to explain mathematically the results of experimental observations. Experiment and theory therefore have a broad overlap. Accordingly, experimental physicists remain keenly aware of the current theoretical work in their fields, while theoretical physicists must know the experimenters' results and the context in which the results need be interpreted.
At present physicists are trying to Precisely define the most fundamental measurable quantities in the universe (e.g., velocity, electric field, kinetic energy). The effort to find the most fundamental description of the universe is a quest that has historically always been a big part of physics.
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