Electromagnetic energy, also known as electromagnetic radiation or EM radiation, is a term used to describe the various energies that travel as wavelengths through space at the speed of light. EM radiation consists of waves of the electromagnetic field, which propagate through space and carry momentum and electromagnetic radiant energy. Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays.

Electromagnetic waves are emitted by electrically charged particles undergoing acceleration, and these waves can subsequently interact with other charged particles, exerting force on them. EM waves carry energy, momentum, and angular momentum away from their source particle and can impart those quantities to matter with which they interact. Electromagnetic radiation can transfer heat, and electromagnetic waves carry the heat, energy, or light waves through a vacuum or a medium from one point to another.

Electromagnetic energy is one of the four fundamental forces of nature, along with the strong force, the weak force, and the gravitational force. These forces have different strength levels and work across varying ranges. Electromagnetic wavelengths are measured on the electromagnetic spectrum, and each has its unique properties.

Electromagnetic energy is used to power the modern world. Without advanced electromagnetic technology, cell phones and computers, Bluetooth, GPS systems, satellite imagery, and scientific research would not be possible.