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  • Brainly User
2014-07-25T11:25:26+05:30
Radiation is energy that comes from a source and travels through some material or through space.Radiation cannot be detected by human senses. A variety of instruments are available for detecting and measuring radiation such as  CD-V(700), CD-V(715),Geiger-Mueller (GM) tube.
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2014-07-27T20:20:56+05:30

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Radiation is first found by marie currie.it is the energy emmited by radio active elements like alpha,beta and gamma rays
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