hello anyone on.line here from my fllw
what is light?
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Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. ... Light exists in tiny energy packets called photons. Each wave has a wavelength or frequency.
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Pupil, in the anatomy of the eye, the opening within the iris through which light passes before reaching the lens and being focused onto the retina. The size of the opening is governed by the muscles of the iris, which rapidly constrict the pupil when exposed to bright light and expand (dilate) the pupil in dim light.
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