The introductory chapter of every textbook provides an insight to origin of the subject. More often its teaching is skipped citing its irrelevance in examination syllabus. This chapter has been scaled down to least of its volume overviewing only the necessary points to be familiar with before indulging into the subject.
The world around us is filled with wonders. Humans have always been eager to know about them in detail. The regular repetition of day and night, change of seasons, sun in the sky during the day while moon and stars at night and many such occurrence have questioned human minds in the earlier days. Their occurrence, pattern, repetitions are observed and related and certain inferences are stated which have been shaped into the subject of science.
Science, derived from Latin name ‘Scientia’ which means to know. It indicates the human instincts to know the world and universe around them. Science has primarily been classified into disciplines of Physics, Chemistry and Biology.
The term Physics is coined from a Greek word ‘Physikos’ meaning “nature”. Though it cannot be defined the major aim lies in indicating the changes around us, defining them and explaining their occurrence in terms of relevant concepts and laws. Methods are devised to control them and their utilization for benefits of mankind and nature.