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.
1 Fatigue is a feeling of tiredness or exhaustion or a need to rest because of lack of energy or strength. 2  Fatigue may result from overwork, poor sleep, worry, boredom, or lack of exercise.3  It is a symptom that may be caused by illness, medicine, or medical treatment such as chemotherapy. Fatigue is a feeling of tiredness or exhaustion or a need to rest because of lack of energy or strength. 2  Fatigue may result from overwork, poor sleep, worry, boredom, or lack of exercise.