F layer

[ ef-ley-er ]

/ ˈɛf ˌleɪ ər /

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noun Physics.

the highest of the radio-reflective layers of the ionosphere, beginning at an altitude of about 80 miles (130 km) and consisting of two parts, the lower part (F1 layer ) being detectable in the daytime only, the higher (F2 layer, or Appleton layer ) being constant and constituting the ionospheric layer most favorable for long-range radio communication.

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Origin of F layer

First recorded in 1925–30

How to use F layer in a sentence

"By John the Flayer's pony," said Pete; and he laughed and made light of his night-long walk.
The Manxman|Hall Caine
He is a treacherous dog and may the flayer get all such treacherous dogs!
The Life of Ludwig van Beethoven, Volume I (of 3)|Alexander Wheelock Thayer
He could imagine the thousands watching grimly while the flayer used his knife.
King--of the Khyber Rifles|Talbot Mundy

Scientific definitions for F layer

F layer

See F region.