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Definition of F Layer in English :

Define F Layer in English

F Layer meaning in English

Meaning of F Layer in English

Pronunciation of F Layer in English

F Layer pronunciation in English

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F Layer

see synonyms of f layer

Noun

1. appleton layer, f layer, f region

the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission

WordNet Lexical Database for English. Princeton University. 2010.

F Layer

see synonyms of f layer
the two dense layers of ions in the F region of the ionosphere that are used to reflect long-range radio signals: the F1 layer, at an altitude of c. 200 to 300 km (c. 125 to 185 miles), exists during the day, and the permanent F2 layer, or Appleton layer, is at c. 225 to 400 km (c. 140 to 250 miles)

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.

F Layer

see synonyms of f layer
n.
1. The highest region of the ionosphere, extending at night from about 190 to 400 kilometers (120 to 250 miles) and during the day from about 145 to 400 kilometers (90 to 250 miles) above the earth. Also called F region.
2. Either of two layers, designated F1 and F2, into which this region is divided during the day, extending respectively from about 145 to 240 kilometers (90 to 150 miles) and from about 190 to 400 kilometers (120 to 250 miles) above the earth.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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