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Unformatted text preview: 1 Visible Light and Other Visible Light and Other Electromagnetic Radiation Electromagnetic Radiation What is spectroscopy? Instruments spectroscope and spectrometer Types of spectra Formation of spectrum Importance of spectroscopy Spectrum Analysis/study of spectrum ---Spectroscopy Instrument used ---spectroscope (a slit, prism and screen) Research instrument --spectrograph or spectrometer (a telescope; a dispersing device (e.g prism or diffraction grating); detector). The diffraction grating consists of a flat glass plate in the surface of which has been ruled with diamond, equidistant parallel straight lines which may be as close as 1000 per mm. yellow red orange green blue violet W h i t e l i g h t Split of light into its component wavelengths (colors). When a chemical is burned, the light produced is made of only specific wavelengths. Different chemical elements have their own series of wavelengths. A spectroscope is used to examine the A spectroscope is used to examine the wavelengths of light emitted from a source wavelengths of light emitted from a source Peacock feathers are natural gratings . A grating spectrograph separates light from a telescope into different colors by passing it through a grating of tiny parallel grooves. Spectrograph 2 Spectra as a Finger Print Spectra as a Finger Print...
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