“Ångström, Anders Jonas (1814–74)”的概念、定义、翻译、参考文献-科学参考

Ångström, Anders Jonas (1814–74)

Physics

who became professor of physics at the University of Uppsala from 1858 until his death. He worked mainly with emission spectra, demonstrating the presence of hydrogen in the sun. He also worked out the wavelengths of Fraunhofer lines. Spectral wavelengths were formerly expressed in angstroms, but the nanometre is now more usual.

Astronomy

He noted that the dark Fraunhofer lines in the Sun’s spectrum had the appearance of a reversed emission spectrum. In 1861 he began an intensive study of the solar spectrum, confirming the presence of hydrogen in the Sun. In 1868 he published an atlas of the solar spectrum and measurements of the wavelengths of over a thousand spectral lines. These measurements were expressed in units of 10⁻¹⁰ m, a length subsequently named the angstrom unit in his honour.

单词	Ångström, Anders Jonas (1814–74)
释义	Ångström, Anders Jonas (1814–74) Physics who became professor of physics at the University of Uppsala from 1858 until his death. He worked mainly with emission spectra, demonstrating the presence of hydrogen in the sun. He also worked out the wavelengths of Fraunhofer lines. Spectral wavelengths were formerly expressed in angstroms, but the nanometre is now more usual. Astronomy He noted that the dark Fraunhofer lines in the Sun’s spectrum had the appearance of a reversed emission spectrum. In 1861 he began an intensive study of the solar spectrum, confirming the presence of hydrogen in the Sun. In 1868 he published an atlas of the solar spectrum and measurements of the wavelengths of over a thousand spectral lines. These measurements were expressed in units of 10⁻¹⁰ m, a length subsequently named the angstrom unit in his honour.
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