Électromagnétiques

Électromagnétiques refers to phenomena involving both electric and magnetic fields. These fields are inextricably linked, meaning a changing electric field can create a magnetic field, and a changing magnetic field can create an electric field. This fundamental relationship is described by Maxwell's equations.

Electromagnetic waves are disturbances that propagate through space by oscillating electric and magnetic fields. These waves travel at the speed of light in a vacuum. The electromagnetic spectrum encompasses a wide range of these waves, differing in their wavelengths and frequencies. Examples include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each part of the spectrum has distinct properties and applications. For instance, radio waves are used for communication, visible light allows us to see, and X-rays are used in medical imaging.

The interaction of electromagnetic radiation with matter is responsible for many observable phenomena. When light, a form of electromagnetic radiation, interacts with an object, it can be reflected, absorbed, or transmitted. This interaction underlies technologies like photography, solar power generation, and optical fibers. Understanding electromagnetism is crucial in fields ranging from physics and engineering to biology and astronomy.