These rays have a frequency range from about 3 x 1018 Hz to 5 x 1022 Hz. They are highly energetic and are produced or emitted by radio-active nuclei.
They have extremely high penetrating power and can cause huge biological damage to tissues and organisms. They are used in medical field to destroy cancer cells (radio-therapy).
Soft γ–rays are used to kill micro-organisms to help preserve food-stuff for longer period. They are used in the study of the structure of nucleus of atoms and also to detect and test faults in constructed structures.
