1801年,德国物理学家里特发现,在可见光谱紫端的外侧一段,能够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;使酸性的硫酸奎宁溶液发出蓝光;能使许多物质发出萤光。这就表明,在紫光的光谱区域外,还有一种看不见的光线存在。后来人们把这种光线叫紫外线或紫外光。紫外线的波长极短,常采用 In 1801, German physicist Ritter discovered that a photographic film containing silver chloride could be sensitized to the outside of the violet end of the visible spectrum; the substance coated with platinum cyanide emitted green light; the acidic quinine sulfate solution was emitted Blu-ray; can make many substances emit fluorescent light. This shows that in the violet spectral region, there is an invisible light exists. Later, people called this light UV or ultraviolet light. UV wavelength is very short, often used