Electromagnetic radiation, also known as EM radiation or EM waves, refers to the energy that is emitted by matter in the form of waves or particles. While this term is commonly used in science, there are several synonyms that can be used interchangeably. Some examples include electromagnetic waves, electromagnetic spectrum, radiant energy, and radiant flux. Additionally, other terms that may be used to describe various types of EM radiation include gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and radio waves. Regardless of the terminology used, all types of EM radiation have the ability to travel through space and interact with matter.