英语词汇“spectral index”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

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spectral index

spectral index n. (See quot. 1956.)

ΚΠ

1956 Observatory LXXVI. 181 The usual terminology is adopted, where the flux density S from a discrete source refers to the flux in both polarizations, and the spectral index x refers to the index in the relationship S ∝ (frequency)^x.

1967 Astrophysical Jrnl. 150 5 The average spectral index of twenty-six spirals between 40 and 21 cm is −0·83.

1974 Nature 4 Oct. 398/2 The spectral shape of the pulsed emission..can be approximated by a power law with an energy spectral index of α ∼ 1 to about a GeV.

extracted from spectraladj.

as lemmas

单词	spectral index
释义	> as lemmas spectral index spectral index n. (See quot. 1956.) ΚΠ 1956 Observatory LXXVI. 181 The usual terminology is adopted, where the flux density S from a discrete source refers to the flux in both polarizations, and the spectral index x refers to the index in the relationship S ∝ (frequency)^x. 1967 Astrophysical Jrnl. 150 5 The average spectral index of twenty-six spirals between 40 and 21 cm is −0·83. 1974 Nature 4 Oct. 398/2 The spectral shape of the pulsed emission..can be approximated by a power law with an energy spectral index of α ∼ 1 to about a GeV. extracted from spectraladj. < as lemmas
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