Radiation

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves". There is a wide range of electromagnetic radiation in nature. Visible light is one example. Radiation with the highest energy includes forms like ultraviolet radiation, x-rays, and gamma rays. X-rays and gamma rays have so much energy that when they interact with atoms, they can remove electrons and cause the atom to become ionized.