What Types of Radiation Are There? The radiation one typically encounters is one of four types: alpha radiation, beta radiation, gamma radiation, and x radiation. Neutron radiation is also encountered in nuclear power plants and high-altitude flight and emitted from some industrial radioactive sources. Alpha Radiation.
Fatigue: A condition characterized by a lessened capacity for work and reduced efficiency of accomplishment, usually accompanied by a feeling of weariness and tiredness. Fatigue can be acute and come on suddenly or chronic and persist.
Fatigue is a subjective condition in which a person feels tired before beginning an activity, lacks the energy to accomplish tasks requiring sustained effort and attention, and becomes unduly exhausted after normal activities. It can range from pervasive and overwhelming to subtle, felt only during all-out competition.