index of refraction

noun phrase

: refractive index

Examples of index of refraction in a Sentence

Recent Examples on the Web Similarly, a time mirror is formed by an abrupt change in the index of refraction—but in time. —IEEE Spectrum, 30 Aug. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'index of refraction.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1829, in the meaning defined above

Time Traveler
The first known use of index of refraction was in 1829

Dictionary Entries Near index of refraction

index number

index of refraction

index patient

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Cite this Entry

“Index of refraction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/index%20of%20refraction. Accessed 16 Apr. 2024.

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Kids Definition

index of refraction

noun
: refractive index

Medical Definition

index of refraction

noun
: the ratio of the speed of radiation (as light) in one medium (as a vacuum) to that in another medium

called also refractive index

More from Merriam-Webster on index of refraction

Britannica.com: Encyclopedia article about index of refraction

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