Discovery
X-RAY is a kind of electromagnetic radiation found by Wilhelm Conrad Röntgen on 8 November 1895.
Radiation
Teh energy flow unstable atom or the nucleus of on atom.
* One Bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
Radiation Source
RI means material that can generate radiation actively and continuosly
RG coverts electricity to radioactive