Cheap Designer Sunglasses block uncomfortably bright lights and protect your eyes from uv rays. All this is thanks to metal powder filters that "select" light as it enters. Colored Designer Mirrored Sunglasses selectively absorb some of the wavelengths that make up the sun's rays because they use very fine metal powders (iron, copper, nickel, etc.). In fact, when light hits the lens, it is subtracted, based on a process called destructive interference. That is, when certain wavelengths of light (uVA, UVB, and sometimes infrared) pass through the Cheap Mirrored Sunglasses lens, on the inside of the lens toward the eye, they cancel each other out. The overlap that creates light waves is no accident: the peaks of one wave and the troughs of the nearest wave combine to cancel each other out. The phenomenon of destructive interference depends on the lens's coefficient of refraction (that is, how much light is deflected as it passes through different substances in the air) and on the thickness of the lens. Generally speaking, the thickness of the lens does not change much, and the refraction coefficient of the lens varies according to the chemical composition.
Polarized Designer Sunglasses Outlet Online offer another mechanism for protecting the eye. The reflected light of asphalt road is a special kind of polarized light.
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