Light is electromagnetic radiation of a wavelength that is visible to the human eye. In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.
Five primary properties of light are intensity, frequency or wavelength, polarization, phase and orbital angular momentum.
Light, which exists in tiny packets called photons, exhibits properties of both waves and particles. This property is referred to as the wave particle duality. The study of light, known as optics, is an important research area in modern physics.
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