Introduction
Unstable nuclei give rise to radioactive isotopes. Although there is a general belief that these isotopes are because of human activities quite a number occur naturally. Most of the radiations that we receive on earth have natural sources. The cosmic rays originate from space and other radioactive isotopes and we expose ourselves to daily. The most significant aspects of these radiations are their ability to transmit energy in terms of waves. The various forms of radiations include the visible light, radio waves and microwaves, which do not have to carry with them enough energy to ionize. Ionizing radiations are the ones, ...
