Appleton layern.

Brit.

/ˈaplt(ə)n ˌleɪə/, U.S.

/ˈæpəlt(ə)n ˌleɪər/,

/ˈæpəlt(ə)n ˌlɛ(ə)r/

Origin: From a proper name, combined with an English element. Etymons: proper name Appleton , layer n.

Etymology: < the name of Edward V. Appleton (1892–1965), British physicist, who discovered the layer + layer n.

Atmospheric Physics. Now disused.

The upper or F stratum of the ionosphere, above the E (or Heaviside) layer; = F-layer at F n. 4. Appleton himself used the term F-layer for this stratum.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > radio wave > [noun] > layer reflecting short waves

Appleton layer1931

1931 Fresno (Calif.) Bee 1 Nov. a7/3 The height of the new Appleton Layer was ascertained by sending a signal which lasted less than one-thousandth of a second.

1943 Electronic Engin. 15 342 Presumably the Heaviside, Appleton..etc. layers in the upper atmosphere also give rise to harmonics of radio waves.

1965 Times 18 June 17/6 Whereas the term, Heaviside layer, is still used the term Appleton layer has dropped out.

1994 Jrnl. Atmospheric & Terrestr. Physics 56 697/2 Appleton always deprecated the term ‘Appleton layer’, although it survived as a more appealing name for use in popular explanations of the ionosphere.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online December 2021).

单词	appleton layer
释义	Appleton layern. Brit. /ˈaplt(ə)n ˌleɪə/, U.S. /ˈæpəlt(ə)n ˌleɪər/, /ˈæpəlt(ə)n ˌlɛ(ə)r/ Origin: From a proper name, combined with an English element. Etymons: proper name Appleton , layer n. Etymology: < the name of Edward V. Appleton (1892–1965), British physicist, who discovered the layer + layer n. Atmospheric Physics. Now disused. The upper or F stratum of the ionosphere, above the E (or Heaviside) layer; = F-layer at F n. 4. Appleton himself used the term F-layer for this stratum. ΘΚΠ the world > matter > physics > electromagnetic radiation > radio wave > [noun] > layer reflecting short waves Appleton layer1931 1931 Fresno (Calif.) Bee 1 Nov. a7/3 The height of the new Appleton Layer was ascertained by sending a signal which lasted less than one-thousandth of a second. 1943 Electronic Engin. 15 342 Presumably the Heaviside, Appleton..etc. layers in the upper atmosphere also give rise to harmonics of radio waves. 1965 Times 18 June 17/6 Whereas the term, Heaviside layer, is still used the term Appleton layer has dropped out. 1994 Jrnl. Atmospheric & Terrestr. Physics 56 697/2 Appleton always deprecated the term ‘Appleton layer’, although it survived as a more appealing name for use in popular explanations of the ionosphere. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online December 2021). < n.1931
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