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 defined as extreme physical or mental tiredness or exhaustion. An example of fatigue is what you feel after you run a 10-mile marathon. physical or mental exhaustion; weariness. the cause of this; hard work; toil.