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单词 atomic spectrum
释义

atomic spectrum

英汉-汉英词典
原子光谱
词组 | 习惯用语
您要查找的是不是:
    atomic spectral line 原子谱线
    atomic spectrum term 原子光谱项
    Hydrogen atomic spectrum 氢原子光谱
    complex atomic spectrum 复杂原子光谱
    atomic spectrum analysis 原子光谱分析
    atomic spectrum of helium 氦原子光谱
    atomic spectrum of hydrogen 氢原子光谱
    hyperfine structure of atomic spectrum 原子光谱的超精细结构
atomic spectrum [物] 原子光谱
英语例句库
  1. This is a kind of atomic spectrum.
    这是一种原子光谱

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中文百科

发射光谱 Emission spectrum

(重定向自Atomic spectrum)
Emission spectrum of a metal halide lamp.
A demonstration of the 589 nm D2 (left) and 590 nm D1 (right) emission sodium D lines using a wick with salt water in a flame
Emission spectrum of hydrogen

发射光谱是当一个元素被激发(加热)时,在相对于电磁辐射的每一个频率中,某些频率的辐射强度增加的现象。

当化学元素中的电子被激发时,它会跃迁至能量较高的轨道上,而当这个电子离开激态,返回低能量的轨道时,能量会被再辐射出来,分离出来的发射谱线就是所提到的波长。注意,辐射的谱线频率会比原来的频率宽一些,这是谱线致宽的效应。

这个项目虽然经常提到可见光的发射光谱,但实际上它存在于整个的电磁频谱,从低能量的无线电波到高能量的γ射线都有。

发射光谱可以用来确定材料的组成,因为在周期表上的每一种化学元素都有各自不同的发射光谱。例如,分析接收到的光谱可以确认恒星的组成。

英语百科

Emission spectrum 发射光谱

(重定向自Atomic spectrum)
Emission spectrum of a metal halide lamp.
A demonstration of the 589 nm D2 (left) and 590 nm D1 (right) emission sodium D lines using a wick with salt water in a flame
Emission spectrum of hydrogen
Schematic diagram of spontaneous emission

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. The energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique. Therefore, spectroscopy can be used to identify the elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances.

近义、反义、联想词
近义词
n.
spectrum

英英词典
atomic spectrum n.
  1. (physics) a spectrum of radiation caused by electron transitions within an atom; the series of spectrum lines is characteristic of the element
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更新时间:2025/6/18 1:15:54