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Fraunhofer's Solar Spectrum and Emission Spectra Discovery

Learn about Joseph von Fraunhofer's 1814 discovery of the solar spectrum, emission spectra, and Kirchhoff’s Three Laws of Spectroscopy. Delve into the science of wavelengths and emission lines in UV to IR regions.

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Fraunhofer's Solar Spectrum and Emission Spectra Discovery

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  1. Solar Spectrum wavelength in Å Joseph von Fraunhofer, 1814

  2. Radiation from hot objects

  3. Emission Spectra Emission spectrum of Hydrogen

  4. Emission Spectra Emission spectrum of Hydrogen Emission spectrum of Iron

  5. Kirchhoff’s Three Laws of Spectroscopy: • Light from a hot solid object has a continuous spectrum with no dark lines • The same light, passed through a cool gas has the same spectrum, but with certain wavelengths missing  dark lines (absorption spectrum) • Light emitted by a hot gas  bright lines superimposed on an otherwise black background  emission spectrum UV IR

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