what type of electromagnetic wave is the most energetic
Lower energy photons seemed to travel as waves. (See figure above) Also, the lowest energy photons travel as really big and long waves, over 3 kilometers long. Most forms of EMR can be dangerous; however the most dangerous form of Electromagnetic radiation has the most energy. This radiation is called gamma rays. Gamma rays are emitted by the nucleus of an atom and can go through 6 feet of concrete, as well as damage your DNA!