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Spectroscopy
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== Theory == The underlying premise of spectroscopy is that light is made of different wavelengths and that each wavelength corresponds to a different frequency. The importance of spectroscopy is centered around the fact that every element in the [[periodic table]] has a unique light spectrum described by the frequencies of light it emits or absorbs consistently appearing in the same part of the electromagnetic spectrum when that light is diffracted. This opened up an entire field of study with anything that contains atoms. Spectroscopy is the key to understanding the atomic properties of all matter. As such spectroscopy opened up many new sub-fields of science yet undiscovered. The idea that each atomic element has its unique spectral signature enabled spectroscopy to be used in a broad number of fields each with a specific goal achieved by different spectroscopic procedures. The [[National Institute of Standards and Technology]] maintains a public Atomic Spectra Database that is continually updated with precise measurements.<ref>"[https://www.nist.gov/pml/atomic-spectra-database Atomic Spectra Database]", NIST.</ref> The broadening of the field of spectroscopy is due to the fact that any part of the electromagnetic spectrum may be used to analyze a sample from the infrared to the ultraviolet telling scientists different properties about the very same sample. For instance in chemical analysis, the most common types of spectroscopy include atomic spectroscopy, infrared spectroscopy, ultraviolet and visible spectroscopy, [[Raman spectroscopy]] and [[nuclear magnetic resonance]].<ref>Saul, Louise. (April 6, 2020). "[https://www.azooptics.com/Article.aspx?ArticleID=1382 The Different Types of Spectroscopy for Chemical Analysis]". AZoOptics. Retrieved on November 10, 2021.</ref> In nuclear magnetic resonance (NMR), the theory behind it is that frequency is analogous to [[resonance]] and its corresponding resonant frequency. Resonances by the frequency were first characterized in mechanical systems such as [[pendulums]], which have a frequency of motion noted famously by [[Galileo]].<ref>Isaac Asimov, Understanding Physics, Vol. 1, p.108.</ref>
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