Radiation is a from of energy. It can come from many sources such as ray machines, fast cooking microwave oven, and even from TV sets. Radiation is dangerous and there risks from being exposed to it. For example, most people know that one of the dangers of long exposure to great amounts of radiation is that it can cause forms of cancer. It can also hurt people in such a way, that if they become parents, their children could be born defective. X-ray machines must give off some radiation, but the risk to health can be cut down. The amount of radiation should be as small as possible. rays should be used only when necessarily.