Question: User: Scene 3: Wavefronts, Rays, and Snell's LawVisual Prompt for AI Video Generator:Prompt: 3D graphic visualization of wave refraction geometry . Parallel green line wavefronts approach a horizontal interface between Medium 1 (Fast) and Medium 2 (Slow) . A bright red ray arrow drawn perpendicular to wavefronts shows the direction of propagation . A dashed vertical Normal Line appears at point P . Angle of incidence θ1 (45 degrees) and angle of refraction θ2 (30 degrees) bend TOWARD the normal in the slower medium[cite: 16]. Glowing HUD displays Snell's Law formula: sin(θ1) / sin(θ2) = v1 / v2 = λ1 / λ2 = 1n2[cite: 16].English Voiceover & Text:Voiceover: "A ray represents the direction of wave movement, always perpendicular to wavefronts[cite: 16]. When a wave enters a slower medium, it bends TOWARD the normal line[cite: 16]. We describe this refraction using Snell's Law: the sine of incidence over sine of refraction equals the ratio of speeds and wavelengths[cite: 16]!"