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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? See examples of light used in a sentence. 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. Visible light is all the colors.
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 millionths of an. When light hits a transparent object, it passes through it almost completely without making a significant shadow. Light is a form of electromagnetic radiation that shows properties of both waves and particles.
