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Lab 5 – Emission Spectra

Lab 5 – Emission Spectra. Color. Wavelength . Light Waves. Wavelength (). Red Light – Longer Wavelength, Lower Energy. Blue Light – Shorter Wavelength, Higher Energy. Formation of Emission and Dark Line Spectra. Kirchhoff’s Laws.

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Lab 5 – Emission Spectra

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  1. Lab 5 – Emission Spectra

  2. Color Wavelength Light Waves Wavelength () Red Light – Longer Wavelength, Lower Energy Blue Light – Shorter Wavelength, Higher Energy

  3. Formation of Emission and Dark Line Spectra

  4. Kirchhoff’s Laws • 1. A hot, dense glowing object (a solid or dense gas) emits a continuous spectrum. • 2. A hot, low-density gas emits light of only certain wavelengths—a bright line spectrum. • 3. When light having a continuous spectrum passes through a cool gas, dark lines appear in the continuous spectrum.

  5. Hydrogen Atom 5 4 -e 434 nm 3 2 656 nm -e 1 -e +P 486 nm 410 nm -e -e 4000 Å 7000 Å

  6. How to Excite an Atom 1. Absorption of a Photon 4 3 4000 Å 7000 Å 2 White Light Source 1 +P 6563 Å Hydrogen Atom -e -e

  7. Aluminum Argon Calcium Carbon Helium Hydrogen Iron Krypton Magnesium Neon Nitrogen Oxygen Sodium Sulfur Xenon

  8. The End

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