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 »

Characteristics that all waves have in common are wavelength, amplitude and frequency. Apart from these properties, different types of waves have a number of varying characteristics. A wave is defined as a repetitive dis... More »

Mechanical motion forms through the sound waves made by vibrating massive objects. Guitar, harp or piano strings are clear examples of the principle, but horns, percussive instruments and woodwinds also create vibrations... More » Science Physics Optics & Waves

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 »

Light waves travel through the process of electromagnetic radiation. The combination of electrical and magnetic fields that light has is what gives light the distinct quality of being able to travel with or without a med... More »

Light travels faster than sound because sound waves can only travel as waves of pressure in a medium, whereas electromagnetic waves, of which light is made, move on their own even through vacuum. Light's speed decreases ... More »

Light is produced through a phenomenon known as electromagnetic radiation, which is composed of both a magnetic and an electrical component. Light, or visible light, is merely one small part of the overall electromagneti... More »