Science is the sermon of today. In every walk of life, since childhood till old age, science plays an important role in the life of man. Basically, the branch of physics concerned with structure and behaviour of nucleus and particles of which it consists is known as Nuclear Physics. This has played vital role in the advancement of science and technology. This encyclopaedic work on Nuclear Physics contains all vital theorie and basic elements on the subject. Efforts are made to incorporate latest information on the theme.