11th Class Physics Notes and Video Lectures free
10+1 Physics Chapter – 1 Physical World Science: The word science has been derived from a Latin word ‘Scientia’ which means ‘ to know’ . Hence science may be defined as the systematic study of facts events and happenings around us is called science. Physics: The word physics has been derived from a Greek word ‘ Fusis ’ which means ‘Nature’ . Hence physics may be defined as the branch of science, which deals with the study of nature and natural phenomena, is called physics. Scientific Method: To know fully about anything we have to follow the following four steps: 1. Systematic Observation 2. Controlled experiments 3. Studying and reasoning 4. Mathematical modeling 5. Theoretical Prediction and verification The above steps taken together are known as Scientific Method. Scientific Theory: A set of minimum number of laws which can explain the behavior of physical phenomena is known as scientific theory. Unification: The effort to explain diverse