1. Lab 5 – Emission Spectra

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

5. Formation of Emission and Dark Line Spectra

6. 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.

9. Hydrogen Atom 434 nm 656 nm 486 nm 410 nm -e -e -e -e -e 4000 Å 7000 Å2
656 nm -e 1 -e +P
486 nm
410 nm -e -e
4000 Å
7000 Å

10. How to Excite an Atom 1. Absorption of a Photon Hydrogen Atom2 3 4
Hydrogen Atom
White Light Source
6563 Å -e -e
7000 Å
4000 Å

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

13. The End