One of the greatest inventions from Sir Thomas Alva Edison was the popular artifact known as the light bulb, which we all know; it reproduces the particles that spread all over an entirearea, known as light.
In order to define light, I have to address that there are two kinds of lights: artificial light and natural light, what is the difference? Natural light at noon sun has ameasure of 10 000 fc., in a cloudy winter day has a measure between 500- 2000 fc. Meanwhile, inside artificial light rarely exceeds 1 300 fc. This is why we prefer natural than artificial light duringdaytime.
fc is the unit of illumination equivalent to that produced by a standard candle at a distance of one foot.
Lux is the unit of illumination equivalent to that produced by a standard candle at adistance of one meter.
1 fc = 11.1 Lux
But, what is light made of? According to Wikipedia The Free Encyclopedia, light is electromagnetic radiation of a wavelength that is visible to the humaneye (about 400-700 nm).
1 nm = 1×10-9 m
In a scientific context, the word light is sometimes used to refer to the entire electromagnetic spectrum. Light is composed of elementaryparticles called photons.
Recently, the world's shortest photon has been produced by physicists at Oxford University. According to Phil Schewe, on his report, light can be thought as a series ofwaves or, the dualistic view of reality prescribed by quantum science, as a collection of quanta, particle-like parcels of light energy referred as photons. At any place along a light beam there may bemany photons present or in especial cases just one. Creating single photons is not easy to do. It is possible to make photons in pairs by sending laser light through special crystals. Even, a pure-color laser beam will consist of many photons; but occasionally one of this photons will be "down converted", that is, will turn into two photons, each with half the energy of the original photon. When...