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 electromagnetic spectrum. The entire spectrum includes gamma rays, X-rays, radio waves, microwaves and infrared light.Know More
Light is produced through either natural or artificial means, such as with the sun or a light bulb, respectively. Visible light, in its simplest terms, is a release of energy in the form of a packet of electromagnetic radiation, which is perceived by the human eye as light. This packet of energy, or photon, is released when excited electrons return to stable orbits, emitting energy as they make the transition. This is part of the quantum mechanics theory of light, which deals with light interactions at atomic levels.
Light is a particle (photon) that behaves like a wave. This is known as the duality of light and is one of the more enigmatic properties of light. According to Encyclopedia Britannica, neither the electromagnetic wave theory nor the quantum theory correctly explain the behavior of light at all levels; both theories are needed to describe the phenomena accurately. It has also been shown that other particles, such as electrons, also exhibit the same wave-like properties. Most recently, the Special Theory of Relativity has been employed to produce the more complete and widely accepted theory of quantum electrodynamics.Learn more about Optics & Waves
X-rays work by passing electromagnetic radiation through the body to create an image on film or on a digital device, thus providing diagnostic imaging. They are a part of the electromagnetic spectrum that includes visible light, ultraviolet light and infrared red heat. X-rays are shorter in wavelength than visible light and heat.Full Answer >
Sound waves are produced by vibration that causes the molecules of a medium to form alternating high- and low-pressure fronts. These waves can travel through solids, liquids and sufficiently dense gases.Full Answer >
A tritium light is a green, glowing light source that has been chemically created with radioactive hydrogen and phosphor. The tritium light is created by sealing tritium gas inside laser-sealed glass tubes coated with phosphor.Full Answer >
The human eye sees light with the pupil and the retina. Located inside the retina are two types of special cells called photoreceptor cells. There are two varieties of photoreceptor cells known as cones and rods.Full Answer >