numerical aperture

nu·mer·i·cal ap·er·ture

N n

- US Pronunciation
- US IPA
- [noo-mer-i-kuh l or noo-mer-ik ap-er-cher]
- /nuˈmɛr ɪ kəl or nuˈmɛr ɪk ˈæp ər tʃər/

- US Pronunciation
- US IPA
- [noo-mer-i-kuh l or noo-mer-ik ap-er-cher]
- /nuˈmɛr ɪ kəl or nuˈmɛr ɪk ˈæp ər tʃər/

Definition of numerical aperture words

noun numerical aperture a measure of the resolving power of a microscope, equal to the index of refraction of the medium in which the object is placed multiplied by the sine of the angle made with the axis by the most oblique ray entering the instrument, the resolving power increasing as the product increases. Abbreviation: N.A. 1

before 1875

One of the 25% newest English words

First recorded in 1875-80

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 2% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

This diagram is provided by Google Ngram Viewer

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