Rainbow Refraction Lab

Interactive simulation to explain:

• How a primary rainbow forms (refraction -> internal reflection -> refraction)
• Why different colors have different refractive indexes (dispersion)
• Why red is always the outer/top color in the primary rainbow
• How prism and raindrop views compare

Run locally

From this folder, run any static server, for example:

python3 -m http.server 8000

Then open http://localhost:8000.

Interaction

• Mouse wheel on canvas: zoom in/out
• Mouse drag on canvas in prism mode: rotate prism
• Teacher Mode: guided 8-cue lecture sequence