Electromagnetic radiation (EMR) is a form of energy that is all around us and takes many forms, such as radio waves, microwaves, X-rays, and gamma rays. Sunlight is also a form of EM energy, but visible light is only a small portion of the EM spectrum, which contains a broad range of electromagnetic wavelengths. Electromagnetic (EM) waves, also called electromagnetic radiation, are created by the coupling of oscillating electric and magnetic fields, whose directions are perpendicular to each other. The direction of propagation of the EM wave is perpendicular to both the electric and magnetic field vectors. Unlike mechanical waves, electromagnetic waves do not need a medium to propagate. They can travel in a vacuum with the speed of light. The heat from a burning fire, the light from the sun, the X ... Electromagnetic Radiation What is a Electromagnetic (EM) Radiation? Electromagnetic radiation is a form of energy that is all around us and takes many forms, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays. Before 1873, electricity and magnetism were thought to be two different forces. Electromagnetic radiation is produced by accelerating charged particles and can be naturally emitted, [8][9] as from the Sun and other celestial bodies, or artificially generated for various applications.
