英语词汇“optical length”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	optical length
释义	optical length noun The distance which in a vacuum would contain the same number of wavelengths as the actual path followed by a ray of light, equal to the product of the actual path-length and the refractive index of the medium if the latter is homogeneous. Origin Late 19th century.
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optical length