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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

1.3K
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
1.3K
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

7.4K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
7.4K
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

1.3K
Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
1.3K
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

669
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
669
Momentum And Radiation Pressure01:20

Momentum And Radiation Pressure

2.5K
An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container.
2.5K
Emission Spectra02:39

Emission Spectra

76.8K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
76.8K

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相关实验视频

Updated: Feb 19, 2026

Spatial Separation of Molecular Conformers and Clusters
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Spatial Separation of Molecular Conformers and Clusters

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在实验中将真空波动与辐射源的波动分开.

Alexa Herter1, Frieder Lindel2,3,4, Laura Gabriel5

  • 1Institute of Quantum Electronics, ETH Zürich, Zürich, Switzerland. alexa.herter@web.de.

Nature communications
|February 17, 2026
PubMed
概括

研究人员使用激光脉冲实验区分真空场和源辐射效应. 这一突破验证了量子波动-分散定理,并使新的量子光学研究成为可能.

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科学领域:

  • 量子光学就是一个量子光学.
  • 量子场理论是量子场理论.
  • 超快的光学超快的光学.

背景情况:

  • 从理论上讲,区分真空场和源辐射效应是具有挑战性的.
  • 费米的两原子问题提供了对原子电磁场相互作用的理论见解.
  • 实验方法以前被认为是不可行的.

研究的目的:

  • 为了实验区分真空场和源辐射效应.
  • 探测真空波动和源辐射引起的量子相关性.
  • 通过实验验证时间域波动-分散定理.

主要方法:

  • 使用超快光学来创建费米两原子问题的实验类型.
  • 在非线性晶体中使用两个激光脉冲.
  • 使用相位感应检测来探测近红外脉冲的不同方程.

主要成果:

  • 成功检测到真空和源辐射诱导的激光脉冲之间的相关性.
  • 证明真空波动和源辐射与不同的脉冲方程相关.
  • 在量子层面上提供了时间域波动-分散定理的实验验证.

结论:

  • 该研究通过实验分离了真空和源辐射效应.
  • 在依赖时间的介质中研究量子辐射的新途径.
  • 能够在模拟曲面时空中进行纠收获和量子场检测.