How Rainbows Form: Sunlight Refraction in Water Droplets Explained #2134321 (License: Personal Use)

This scientific illustration demonstrates the optical process of dispersion: when white sunlight enters a spherical water droplet, it refracts (bends), reflects off the inner surface, and refracts again upon exiting, separating into its constituent colors. The diagram highlights that violet light deviates more than red due to its shorter wavelength, forming the familiar arc of a rainbow. Internal reflection within the droplet ensures the light exits at specific angles (~42° for red, ~40° for violet) relative to the incoming sun rays.

Used in educational science content (e.g., physics or earth science lessons), meteorology explainers, or children’s STEM resources to visualize rainbow formation. Matches user intent seeking clear, accurate explanations of natural optical phenomena.