How Rainbows Form: Science of Light Refraction and Dispersion #2156199 (License: Personal Use)

This educational diagram shows two complementary views: on the left, an observer sees a rainbow arc when sunlight strikes raindrops in front of them; on the right, a magnified raindrop reveals how white light separates into spectral colors (red to violet) due to refraction and internal reflection at a critical 42° angle. The red band appears on the outer edge because it refracts least, while violet bends most.

Used in science education websites, meteorology resources, or physics lesson pages to explain optical phenomena; matches user intent for understanding natural light behavior, weather optics, or preparing classroom materials.