英语词汇index of refraction怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	index of refraction
释义	index of refractionn.（名词） The ratio of the speed of light in a vacuum to the speed of light in a medium under consideration. Also called refractive index 折射率：真空中的光速与某种被考虑的媒介中的光速之比也作 refractive index
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