Physical World- Notes
Physics Importance and Scope
Physical World : Physics is the branch of science that deals with the natural phenomena in terms of basic laws and physical quantities.
The scope of physics can be divided into two major domains that are, macroscopic and microscopic.
The macroscopic domain deals with phenomena at laboratory, realistic, terrestrial and astronomical scale and the microscopic domain deals with nuclear, molecular and atomic phenomena.
Reductionism is the approach to derive the properties of bigger or more complex system from the properties or interaction of the simpler parts or constituents of the system.
There are four fundamental forces in nature and all other forces we know derived from these forces. These fundamental forces are gravitational force, electromagnetic force, weak nuclear force and strong nuclear force.
Scientific generalizations based on physicist’s observations and experiments are presented as laws or empirical relations in form of mathematical equations are known as physical laws.