focal ratio


Examples of focal ratio in a Sentence

Recent Examples on the Web An eyepiece changes the focal ratio of your telescope, thus changing the magnification. Cameron Johnson, Popular Mechanics, 10 Nov. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'focal ratio.' 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

1883, in the meaning defined above

Time Traveler
The first known use of focal ratio was in 1883

Dictionary Entries Near focal ratio

Cite this Entry

“Focal ratio.” Dictionary, Merriam-Webster, Accessed 24 Feb. 2024.

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