6A02. Straight Line Propagation
6A10. Reflection from Flat Surfaces
6A20. Reflection from Curved Surfaces
6A40. Refractive Index
6A42. Refraction at Flat Surfaces
6A44. Total Internal Reflection
6A46. Rainbow
6A60. Thin Lens
6B40. Blackbodies
6C10. Diffraction Through One Slit
6C20. Diffraction Around Objects
6D10. Interference from Two Sources
6D20. Gratings
6D30. Thin Films
6F30. Dispersion