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Gamma ray is a type of radiation that has no mass & no charge. Gamma rays have a high penetrating power. Text us. Tags: gamma ray, radiation, mass. Wednesday, February 01 2012.
There are three types of ionizing radiation as classified by scientists based on how hard it is to stop the waves or particles. 1  Alpha radiation is the easiest to stop as it can be stopped by paper. 2  Beta radiation is a bit more difficult to stop and requires metal to stop it, though the metal can be thin.