X1014341222-00013-03148</DOCNO> The Direction of Bending Lesson 1: Refraction at a Boundary Boundary Behavior Refraction and Sight The Cause of Refraction Optical Density and Light Speed The Direction of Bending The Secret of the Archer Fish Lesson 2: The Mathematics of Refraction The Angle of Refraction Snell's Law Ray Tracing and Problem-Solving Determination of n Values Lesson 3: Total Internal Reflection Boundary Behavior Revisited Total Internal Reflection The Critical Angle Lesson 4: Interesting Refraction Phenomena Dispersion of Light by Prisms Rainbow Formation Mirages The Lengthening of Days Lesson 5: Image Formation by Lenses 