radiation consisting of self-sustaining oscillating electric and magnetic fields at right angles to each other and to the direction of propagation. It does not requirea supporting medium and travels through empty space at the speed of light
See also photon
Examples of 'electromagnetic radiation' in a sentence
electromagnetic radiation
They said electromagnetic radiation emitted by mobile and cordless phones can damage cells, making tumours more likely.
The Sun (2012)
These are a form of electromagnetic radiation, emitted by all people and objects thatlie between the infrared and microwave parts of the spectrum.