Light

Light is a form of electromagnetic radiation. It is the natural agent that stimulates sight and makes things easy to see. Light is the opposite of darkness...

A light-bulb produces light from electricity. In addition to lighting a dark space, they can be used to show an electronic device is on, to direct traffic...

A light year (symbol: ly) is the distance that light travels in empty space in one year. Since the speed of light is about 300,000 km per second (about...

The speed of light, in any medium, which is usually denoted by c {\displaystyle c} , is a physical constant important in many areas of physics. It is...

A light-emitting diode (LED) is a semiconductor device that produces light from electricity. LEDs last a long time and do not break easily (compared to...

A red-light district is a part of an urban area where sex work is concentrated. Sex work in red-light districts is either legal or illegal, but tolerated...

this order: Red light on: This tells drivers to stop. Green light on: This means the driver can start driving or keep driving. Yellow light on: This tells...

too much light. Several species, including plants and humans, are badly affected by light pollution. Most people have never heard of light pollution...

In photosynthesis, a light-dependent reaction uses light energy from the sun to split water which has been taken in by the organism. Water, when split...

A grow light or plant light is an artificial light source, generally an electric light. It is designed to make plant growth faster by creating an electromagnetic...

Wiki Commons has media related to Light rail. Light rail or light rail transit (LRT) is a form of urban rail public transportation. Generally it...

of the light-dependent reactions (ATP and NADPH) and various enzymes. Therefore, the light-independent reaction cannot happen without the light-dependent...

The Docklands Light Railway (DLR) is a light metro or light rail system in London, England. It opened on 31 August 1987 to serve the redeveloped Docklands...

similar to light blue. The first use of light blue as a color name in English was in 1915. Crayola light blue is the color that is called "light blue" in...

A light machine gun, or LMG, is a type of machine gun that is designed to be used by only one soldier. Light machine guns are often used as squad automatic...

Light truck or light-duty truck is a US classification for trucks the size of cars or truck-based vehicles with a gross vehicle weight up to 8,500 pounds...

The Stadium of Light is a football stadium in Sunderland, England. It is the current home stadium of Sunderland A.F.C. This stadium was officially inaugurated...

Collimated light is light whose rays are parallel. This light spreads slowly as it travels. The word collimated is related to collinear, because all the...

Light music is a musical style that might often be called "easy listening". It started in the United Kingdom in the 19th century and became very popular...

A light microscope works like a refracting telescope except that the object is very close to the objective lens. An object to be studied, for example...