Infographie Pédagogique sur la Diffusion de Rayleigh

A tall single-page educational science infographic explaining "[WHY THE SKY IS BLUE — AND SUNSETS ARE RED]" with the subtitle "[Rayleigh scattering explained in one page]". Clean flat-design science-magazine aesthetic, suitable for a classroom handout poster. Canvas: Vertical 9:16 layout on an off-white background, framed by solid black horizontal bars at the very top and bottom. Centered crisp white text reads "GPT Image 2" inside each black bar. Generous margins, thin navy divider lines, rounded card containers, and a consistent palette of navy, teal, coral, and yellow. Layout: Exactly 5 numbered sections, each marked on the left by a dark navy circular badge with white numerals 1 through 5. Geometric sans-serif typography throughout, bold uppercase navy headings, and teal italic subtitles. Section 1 — Visible Light Spectrum: Heading reads "VISIBLE LIGHT SPECTRUM". One long rounded horizontal rainbow gradient bar running from violet/blue at the left through cyan, green, yellow, orange, to red at the right. Exactly 4 wavelength tick-mark labels underneath: "400 nm", "500 nm", "600 nm", and "700 nm". Section 2 — Sunlight Entering the Atmosphere: Heading reads "SUNLIGHT ENTERING THE ATMOSPHERE". Stylized yellow sun on the left, curved edge of Earth on the right, and a pale blue atmospheric band between them filled with small blue air-molecule dots. Exactly 4 blue horizontal rays scatter with small blue directional arrows, while exactly 3 red horizontal rays pass straight through to Earth. Exactly 6 molecule scattering icons in the atmosphere. Below the rays, two captions: "Blue light: scattered ~5.5x more" in blue text, and "Red light: passes through" in red text. Section 3 — Formula and Bar Chart: Two rounded rectangular cards side by side. Left card features the large equation "I ∝ 1/λ⁴" with the caption "Scattering intensity is inversely proportional to the fourth power of wavelength". Right card titled "RELATIVE SCATTERING (450 nm vs 650 nm)" with a 2-bar chart: a tall blue bar labeled "450 nm", a short red-orange bar labeled "650 nm", y-axis labeled "Relative scattering", and bold text "≈ 4.4 : 1" on the right. Section 4 — Noon vs Sunset: Two circular diagrams side by side. Left diagram titled "NOON — short path through atmosphere" showing a high sun above curved Earth, a small black human silhouette, blue dots, and vertical rays with blue scattering arrows. Right diagram titled "SUNSET — long path" showing a low sun near the horizon, a long atmospheric path, blue light scattering away, and a red ray reaching the silhouette, captioned "Blue is scattered away before reaching your eye". Section 5 — Facts: Three rounded cards in a row. Card 1 has a minimalist Mars icon and text "Fact: Mars sunsets are blue". Card 2 has a teal wave icon and text "Fact: The ocean is blue for a different reason". Card 3 has a purple eye icon and text "Fact: Violet scatters most, but our eyes favor blue". Footer: Small centered text: "Sources: Rayleigh (1871) · Illustration for classroom use · Fig. 1 of 1". Flat vector style, clean line art, high legibility.