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Applications of Chemical Analysis THE USES OF SPECTROSCOPY Spectroscopy is the study of line spectrums Line spectrums are important tools for identifying elements because no two line spectra are alike. ASTRONOMY Scientists use spectroscopes attached to telescopes to look at stars The spectrum of a star can tell us: the composition of the star the chemical elements found in the star how much of each element is present in the star the temperature of the star the direction the star is moving relative to the Earth MEDICAL USE Modern spectroscopes allow very precise detection and measurement of substances in human tissue and fluids This technology can be used to monitor athletes for the use of performance-enhancing substances Medical patients can be tested for substances that indicate the onset or progress of diseases, which allows for better diagnostic tests to help fight against diseases PRECIOUS GEMSTONES The minerals in precious gems have unique line spectra. These can be used to determine if a gem is genuine or a fake without damaging the stone. Some minerals look almost identical to precious gems, even to a trained eye. The ruby in the Crown Jewels of the British monarchy is not a ruby at all, it is a much less valuable mineral called a red spinel. MRI Magnetic resonance imaging is a tool used in the medical industry to diagnosis many types of injuries and conditions in the body such as: Diagnosing: Multiple sclerosis, tumors, infection, tendonitis and early stages of strokes Visualizing: torn ligaments Evaluating: masses in soft tissue, bone tumors, cysts and bulging or herniated spinal discs Archaeology James Myster is an archaeologist who used spectroscopy to determine where different locations of buildings were build in the late 18th century. Summary Line spectra are a useful way to analyze and identify atoms in: Astronomy, Medicine, Precious Gems, MRI and Archaeology.