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Light is a form of electromagnetic radiation that shows properties of both waves and particles. It is a form of energy. Light also keeps the Earth warm. Light exists in tiny energy packets called photons. Each wave has a wavelength or frequency. The human eye sees each wavelength as a different color.
This is the front page of the Simple English Wikipedia. Wikipedias are places where people work together to write encyclopedias in different languages. We use Simple English words and grammar here. The Simple English Wikipedia is for everyone, such as children and adults who are learning English.
- History
- How It Works
- Uses
Guiding light by internal reflection, the principle that makes fiber optics possible, was first demonstrated by Daniel Colladon and Jacques Babinet in Paris in the early 1840s. John Tyndall, a physicist, demonstrated it during his public lectures in London, 12 years later. The principle was first used for internal medical examinations by Heinrich L...
An optical fiber is a long, thin strand of clear material. Its shape is usually similar to a cylinder. In the center, it has a core. Around the core is a layer called the cladding. The core and cladding are made of different kinds of glass or plastic, so that light travels slower in the core than it does in the cladding. If the light in the core hi...
Fiber-optic communication
The main use of optical fiber is in communication (telecommunication). Fiber-optic communication transmits information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have helped with the advent of the Information Age. Early systems had short range but later...
Other uses
Optical fibers can be used as sensors. Special fibers are used for this, that change how they pass light through when there is a change around the fiber. Sensors like this can be used to detect changes in temperature, pressure, and other things. These sensors are useful because they are small and do not need any electricityat the place where the sensing happens. These fibers are also used to carry light for humans to see. This is sometimes used for decoration, like fiber-optic Christmas trees...
Wikipedia is a free online encyclopedia website in 336 languages of the world. 324 languages are currently active and 13 are closed. People can freely use it, share it, and change it, without having to pay. It is also one of the biggest wiki organizations.
The Solar System is the Sun and all the objects that travel around it. The Sun is orbited by planets, asteroids, comets and other things. Planets and dwarf planets of the Solar System. Compared with each other, the sizes are correct, but the distances are not. The Solar System is about 4.568 billion years old. [1]
Japan ( Japanese: 日本; romanised as nihon or nippon) is a country in East Asia. It is a group of islands close to the east coast of Korea, China and Russia. The Pacific Ocean is to the east of Japan and the Sea of Japan is to the west. [15] . Most people in Japan live on one of the four islands.
Nude photography is a style of photography which shows the nude human body as a form of art. This is different from erotic photography, and pornography which focus on sexual arousal. Recumbent female nude, Amélie is a nude photograph by Félix-Jacques Moulin, done in the early 1850s.
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