How Rainbows Form: Science of Light Refraction in Raindrops #2156192 (License: Personal Use)

This educational diagram shows white sunlight entering two raindrops-labeled A and B-where it undergoes refraction, internal reflection, and dispersion, separating into spectral colors. Drop A produces the primary rainbow (red on top), while drop B contributes to the fainter secondary rainbow (reversed color order) due to a second internal reflection. The observer’s eye sees these rays converging at specific angles (42° and 51°), forming the characteristic arcs.

Used in science education websites, physics explainers, and meteorology resources to illustrate atmospheric optics; matches user intent for understanding natural phenomena or preparing classroom material.