F1 layer

noun

: the lower of the two layers into which the F region of the ionosphere splits in the daytime that occurs at varying heights from about 80 to 120 miles (130 to 200 kilometers) above the earth's surface

Word History

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of F1 layer was in 1933

Dictionary Entries Near F1 layer

F

F1 layer

F2F

Cite this Entry

“F1 layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/F1%20layer. Accessed 17 Apr. 2024.

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