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light source

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Secondary Information

Definition

A light source is anything that produces light. Some common light sources include the sun, lightbulbs, fireflies, and lightning. Light sources can be natural or artificial.

Natural light sources, such as the sun, produce light by nuclear fusion. This is a process that takes place in the sun's core, where hydrogen atoms are fused together to form helium atoms. This process releases a lot of energy, some of which is in the form of light.

Artificial light sources, such as lightbulbs, produce light by heating a filament until it glows. The filament is made of a material that gives off light when it is heated.

Light sources are important because they allow us to see. Without light, we would not be able to see the world around us.

Natural light sources:

  • The sun
  • Stars
  • Lightning
  • Fire
  • Bioluminescence (the production and emission of light by a living organism)
  • Artificial light sources:
  • Lightbulbs
  • Fluorescent lights
  • LED lights
  • Candles
  • Fireplaces

How can the word be used?

The sun is the main light source for the Earth.

light source

Different forms of the word

Noun: A light source is anything that emits or produces light. Many common light sources are artificial, such as lightbulbs and fireflies. However, there are also many natural light sources, such as the sun, stars, and fireflies.

Adjective: A light source can also be used as an adjective to describe something that emits or produces light. For example, a light source lamp is a lamp that emits light.

Verb: To light source is a verb that means to provide light to something. For example, the sun lights the Earth.

Etymology

The word "light source" is made up of two words: "light" and "source".

The word "light" comes from the Old English word "leoht", which also means "light". It was first used in English in the 7th century.

The word "source" comes from the Latin word "sursus", which means "upward". It was first used in English in the 14th century.

So, the word "light source" literally means "something that emits light upwards".

Question

What is a light source?