Electromagnetic waves carry electromagnetic energy, also known as electromagnetic radiation, through matter, empty space, momentum and angular momentum. Depending on their frequency and wavelength, electromagnetic waves ... More »

Electromagnetic waves form from the vibrations of electric and magnetic fields. Unlike mechanical waves, electromagnetic waves do not need a medium to propagate, allowing them to travel through air, solids and even outer... More »

Heinrich Rudolph Hertz, a German physicist, discovered the existence of electromagnetic waves in 1887. This was a result of his expansion of James Clerk Maxwell's mathematical "Electromagnetic Theory of Light," published... More »

Light waves, a form of electromagnetic radiation, are energy-carrying waves able to self-propagate through the vacuum of space at 3x10^8 meters per second. While "light" sometimes colloquially refers to the entire electr... More »

Electromagnetic energy is a form of energy that can be reflected or emitted from objects through electrical or magnetic waves traveling through space. Electromagnetic energy comes in many examples including gamma rays, X... More »

The spectrum of electromagnetic radiation is comprised of waves or particles that carry different amounts of energy. The visible spectrum is what humans and most animals see. The least energetic range of electromagnetic ... More »

Some characteristics shared by all electromagnetic waves are that they all travel at the speed of light and their transmission does not need a medium. These wave types can also travel through empty spaces. More »