6A Geometrical Optics# 6A01 Speed of Light# Speed%20of%20light-Foucault-Michelson 6A02 Straight Line Propagation# 6A10 Reflection From Flat Surfaces# Confusing%20mirrors Corner%20cube 6A20 Reflection from Curved Surfaces# 6A40 Refractive Index# Chromatic%20aberration Curved%20lightbeams 6A42 Refraction at Flat Surfaces# Brewster’s%20angle%20_3_ 6A44 Total Internal Reflection# Brewster’s%20angle%20_3_ 6A46 Rainbow# 6A60 Thin Lens# Chromatic%20aberration 6A61 Pinhole# 6A65 Thick Lens# 6A70 Optical Instruments# Magnifying%20glass