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 refers to a lack of energy. It is different from weakness, which refers to a loss of strength or power, and drowsiness, because you can feel tired without feeling drowsy or sleepy. Although people sometimes use these terms interchangeably, from a medical perspective the symptoms are distinctly different.