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：2025/11/23
heliochromism
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(physics, chemistry) The property of certain photochromic materials of colouring in near-ultraviolet light and then fading in its absence; they are used in the lenses of sunglasses
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heliochromism
Researchers observed heliochromism in the coating, which darkened under near-ultraviolet light and faded when the light was removed.
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Researchers observed heliochromism in the coating, which darkened under near-ultraviolet light and faded when the light was removed.
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