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If you look at the incandescent lamp with the naked eye, then the brightness will be one. Looking at it through a plastic lens is different. If two lenses are placed between the eye and the lamp, the lamp will gradually disappear from view altogether. Visible light is a way of propagating energy in the form of electromagnetic waves, whose vibrations occur in all directions perpendicular to the direction of light propagation. And in polarized light, the vibrations of electric fields are parallel
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