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1.紫外线的发现1801年;德国物理学家里特发现了一种看不见的光线。它在可见光谱紫端的外侧一段,能使含有氯化银的照相底片感光;使涂有铂氰化钦的物质发出绿光;使呈酸性的硫酸奎宁溶液发出蓝光;能使许多物质发出荧光。上述现象表明,在紫光的光谱区域外,还有一种看不见的光线存在。后来,人们把这种用肉眼看不见的光线
1. The discovery of UV 1801; German physicist Ritter discovered an invisible light. It is on the outer side of the violet end of the visible spectrum and is capable of sensitizing the photographic film containing silver chloride; glows the substance coated with platinum cyanidate; glows the acidic quinine sulfate solution blue; enables many substances to fluoresce . The above phenomenon shows that in the violet spectral region, there is an invisible light exists. Later, people put this invisible light with the naked eye