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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. Feb 6, 2026light is electromagnetic radiation that can be detected by the human eye.

But what exactly is light? Light is just one form of electromagnetic radiation, or electromagnetic waves. Light in physics, its properties, colours, and behaviour, including reflection, refraction, and optics explained clearly.

Light is a form of electromagnetic radiation, which means it has electric fields and magnetic fields vibrating back and forth very quickly as a wave. 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. 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. Our team is composed of the best certified experts in the lighting industry, ensuring you receive the most current and informed advice, whether you are tackling a residential refresh or a large.

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