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- 1-1A: Refraction (by John Souders)
- 1-2A: Optical Density (by Gary Beasley)
- 1-3A: Laser Hazard Classifications (by Fred Seeber)
- 1-4A: Total Internal Reflection (by John Souders)
- 1-5A: Diffraction (by Chrys Panayiotou)
- 1-6A: Metastable States and Stimulated Emission
(by John Souders)