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The main source of natural light on earth is the sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. Dec 29, 2025light is electromagnetic radiation that can be detected by the human eye.

But what exactly is light? The meaning of light is something that makes vision possible. How to use light in a sentence.

Light is a type of energy that enables us to see with our eyes. Light travels from a source, like the sun or a light bulb, to our eyes, and to the surroundings. Light is just one form of electromagnetic radiation, or electromagnetic waves.

Light synonyms, light pronunciation, light translation, english dictionary definition of light. In common usage, the term light (or visible light) refers to electromagnetic radiation in a wavelength range that is visible to the human eye (about 400–700 nanometers (nm) (15.7-27.6. In order to see, there must be light.

Light shines on an object, then bounces off, or reflects, back to our eyes. Our eyes are sensitive to a certain kind of light called visible light. Light isn’t made of matter, so it doesn’t have mass.