Question: User: Scene 3: Wavefront Compression & Mathematical FormulaVisual Prompt for AI Video Generator:Prompt: A futuristic dynamic physics diagram on a dark background . A sound source S moves horizontally to the right with velocity Vs through stationary air[cite: 14]. Expanding circular wave rings illustrate short wavelength λ_ahead in front, and long wavelength λ_behind in back[cite: 14]. Animated glowing formula pops up: f' = fs * (v + v_o) / (v - v_s)[cite: 14]. The speed of sound v remains constant in air[cite: 14]. Highlighted text: "Source movement changes wave spacing, NOT wave speed[cite: 14]!"English Voiceover & Text:Voiceover: "Crucial rule: moving the source alters the spacing between wavefronts, but never changes the speed of sound in air[cite: 14]! Using the Doppler equation, approaching sources decrease wavelength and increase observed frequency f-prime[cite: 14]."