F region

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F region

n.

F region

n
(General Physics) the highest region of the ionosphere, extending from a height of about 150 kilometres to about 1000 kilometres. It contains the highest proportion of free electrons and is the most useful region for long-range radio transmission. Also called: Appleton layer See also ionosphere
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Noun1.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
ionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons
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References in periodicals archive ?
With the f-layer compromised, the hair shaft becomes very "thirsty" and will absorb water quickly and more easily.
The F-layer consists of one layer at night, but during the day, a deformation often forms creating layers labeled F 1 and F 2 .
pH10) leading to better preservation of the hair's natural protective coating called the f-layer.