Existentialism is a philosophy that emphasizes individual existence, freedom and choice. It is the view that humans define their own meaning in life, and try to make rational decisions despite existing in an irrational universe. It focuses on the question of human existence, and the feeling that there is no purpose or explanation at the core of existence. It holds that, as there is no God or any other transcendent force, the only way to counter this nothingness (and hence to find meaning in life) is by embracing existence.
There are three primary radiation types associated with radioactivity. Radioactivity is the spontaneous emission of energy from the nucleus of certain elements, most notably uranium.There are three forms of energy associated with radioactivity; alpha, beta and gamma radiation.The classifications were originally made according to the penetrating power of the radiation, see figure 2.uclear Radiation. There are three primary radiation types associated with radioactivity. Radioactivity is the spontaneous emission of energy from the nucleus of certain elements, most notably uranium. There are three forms of energy associated with radioactivity; alpha, beta and gamma radiation.
1 Radioactivity. 2  This breakdown is called radioactive decay of the unstable nucleus of the atom (radioisotope). 3  In the breakdown of the unstable nucleus, energy is released by the emission of alpha, beta and gamma ionising radiation (see diagram below). This breakdown is called radioactive decay of the unstable nucleus of the atom (radioisotope). 2  In the breakdown of the unstable nucleus, energy is released by the emission of alpha, beta and gamma ionising radiation (see diagram below).