ABSTRACT
Due to necessity and curiosity, man tries to learn and understand the surroundings where he lives. The necessity comes from the urge to make man’s life comfortable, whereas the curiosity leads to exploring unknown facts. In the scientic and technological world, learning and understanding of variousphenomena of nature, universe, space, or man-made objects necessitates understanding the state, amount, or value of various factors that affect their phenomenon. Acquiring the knowledge of the state, amount, or value of variousfactors is termed as measurement. The factors cannot be explored fully unless the need or requirement can be quantied.
