| Gamma rays are electromagnetic radiation originating in the atomic nuclei, physically identical to x-rays. |
| Gamma radiation is a form of electromagnetic radiation, just like radio waves and visible light, only much more energetic. |
| Even though the electron is in constant motion, it does not emit electromagnetic radiation from a stationary state. |
| Active ground-based remote sensing uses pulsed electromagnetic radiation sources such as lasers and radars to probe atmospheric structure. |
| The intensity of the electromagnetic radiation emitted by a source varies as a function of both frequency and direction. |
| Astronomers explore the universe by passively detecting electromagnetic radiation and cosmic rays emitted by celestial objects. |
