What does f region mean?

Definitions for f region
f re·gion

Here are all the possible meanings and translations of the word f region.

Princeton's WordNet

  1. Appleton layer, F layer, F region(noun)

    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

Freebase

  1. F region

    The F region of the ionosphere is home to the F layer of ionization, also called the Appleton layer, after the English physicist Edward Appleton. As with other ionospheric sectors, 'layer' implies a concentration of plasma, while 'region' is the area that contains the said layer. The F region contains ionized gases at a height of around 150–800 km above sea level, placing it in the Earth’s thermosphere, a hot region in the upper atmosphere, and also in the heterosphere, where chemical composition varies with height. Generally speaking, the F region has the highest concentration of free electrons and ions anywhere in the atmosphere. It may be thought of as comprising two layers, the F1-and F2-layers. The F-region is located directly above the E region and below the protonosphere. It acts as a dependable reflector of radio signals as it is not affected by atmospheric conditions, although its ionic composition varies with the sunspot cycle. It reflects normal-incident frequencies at or below the critical frequency and partially absorbs waves of higher frequency. The F region is the region of the ionosphere which is very important for HF radio wave propagation. This F region is very anomalous in nature.

How to pronounce f region?

  1. Alex
    Alex
    US English
    Daniel
    Daniel
    British
    Karen
    Karen
    Australian
    Veena
    Veena
    Indian

How to say f region in sign language?

  1. fregion

Numerology

  1. Chaldean Numerology

    The numerical value of f region in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of f region in Pythagorean Numerology is: 2

Examples of f region in a Sentence

  1. Eric Meyers of the association:

    It is a crisis in the region.

  2. Scott Stewart:

    The region is awash in weapons.

  3. Tokuo Hayakawa:

    This region will definitely go extinct.

  4. Peyman Kargar:

    We're talking about big growth in the region.

  5. Le Drian:

    This posture risks endangering the region more.

Images & Illustrations of f region

  1. f regionf regionf regionf regionf region

Translation

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"f region." Definitions.net. STANDS4 LLC, 2019. Web. 26 Jun 2019. <https://www.definitions.net/definition/f+region>.

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