请输入您要查询的词汇:

 

词汇 angstrom
词源
angstrom. A unit of length equal to one 10-millionth of a mil- limeter is known as an angstrom unit, or angstrom. It is used primarily to measure wavelengths of light and was named for Anders Jonas Angstrom (1814–74), Swedish astronomer and physicist, as was the Angstrom crater in the moon. Anders Ang- strom taught physics at Uppsala University, his most important research work undertaken in heat conduction and light, and he is considered one of the founders of spectrum analysis. In 1867 he became the first man to examine the spectrum of the aurora borealis; the characteristic bright line in its yellow-green region is often called the Angstrom line in his honor.
随便看

 

英语词源词典收录了13259条英语词源词条,基本涵盖了全部常用英语词汇的起源、历史,是研究英语词汇或通过词源学英语的必备工具。

 

Copyright © 2000-2024 Newdu.com.com All Rights Reserved
更新时间:2025/8/26 23:12:16