In literature from ancient Rome there are complaints of foul air, while in 1273 the inhabitants of London were discussing the prohibition of coal burning to improve air quality. However, the measurement and analysis of aerosols only became established in the second half of the 19th century. In 1847 presented the first concept of particles in the air in his condensation nuclei experiment and his ideas were confirmed in later experiments by Coulier in 1875.
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The father-and-son scientific team of and, who were 1915 Nobel Prize Winners, were the original pioneers in developing X-ray emission spectroscopy. An example of a spectrometer developed by, which was used by both father and son to investigate the structure of crystals, can be seen at the Science Museum, London. X-ray spectroscopy is a general term for several spectroscopic techniques for characterization of materials by using x-ray radiation. The Thermo Scientific™ ARL™ OPTIM'X WDXRF Spectrometer provides all the benefits of wavelength dispersive x-ray fluorescence (WDXRF), one of the most versatile methods for elemental analysis of solids and liquids. As shown in Figure 3813a, WDS uses crystal monochromators to disperse the emitted X-ray spectrum in terms of Bragg diffraction angle and thus wavelength.
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Electron spectrometers may determine electron energy based on, retarding potential (effectively a ), resonant collision or curvature in a deflecting field (magnetic or electric). The in the solution of motion in a magnetic or electric system with rotational symmetry leads to radial focusing onto a mean radius.
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This 8-ounce handheld spectrophotometer reads paint colors across multiple surfaces and lighting conditions, then wirelessly sends data to the Spectro App on your phone. You'll access fan deck libraries from major paint brands for instant color matching. State-of-the-art, real-time spectral performance and with rugged with wireless capabilities; ASD NIR spectrometers and spectroradiometers specialize in field-portable full-range UV/Vis/NIR/SWIR (350 nm - 2500 nm) for material identification and analysis. When you need to measure light quality, match colors, or identify materials in the field, you'll find five portable spectrometers that scientists rely on daily. Each device serves different purposes: some measure LED color temperature and brightness, others match paint shades, and a few handle.
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For the investigation of liquid flows conductivity wire-mesh sensorswere firstly developed. They determine the local conductivity of a liquid in the cross-section of an investigation volume.
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