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单词 reversing layer
释义

Definition of reversing layer in English:

reversing layer

noun
Astronomy historical

  • The lower region of the solar chromosphere, formerly regarded as a distinct layer where the dark Fraunhofer lines of the solar spectrum are produced, superimposed on the continuous spectrum of the underlying photosphere.

Origin

Late 19th century; earliest use found in The Leeds Mercury.

Definition of reversing layer in US English:

reversing layer

noun
Astronomy historical

  • The lower region of the solar chromosphere, formerly regarded as a distinct layer where the dark Fraunhofer lines of the solar spectrum are produced, superimposed on the continuous spectrum of the underlying photosphere.

Origin

Late 19th century; earliest use found in The Leeds Mercury.
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更新时间：2025/7/3 4:09:53