Answers

2014-11-03T20:34:26+05:30
They re a type of electromagnetic radiation with wavelenghts in the electromagnetic spectrum longer than infrared light .They have frequencies from 300GHz to as low as 3KHz
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2014-11-03T20:47:50+05:30
As the nucleus is made up of one or more positively charged particles, radioactivity occurs when something happens to cause the atom to send off one or more particles from its nucleus. At the same time it may send out energy in the form of rays(gamma rays[γ]).The disintegration of those atoms helps the element to become radioactive and thus, releasing radioactive waves. The disintegration of atoms and their striking of to other atoms results in the production of rays as mentioned in ur qn.
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