Why do prisms create rainbows?

Answer: Wavelengths bend at angles

Wavelengths bend at angles ✓ — Correct! White light contains all visible wavelengths (colors). When entering a prism, different wavelengths refract at slightly different angles—violet bends most (shorter wavelength, higher refraction), red bends least. This separates white light into its spectrum. Called dispersion! Newton demonstrated this with prisms in 1666.

Prism reflects internal colors — Wrong. Prisms don't contain internal colors. They separate existing wavelengths in white light through differential refraction (dispersion).

Light speed changes produce colors — Wrong. Speed does change in glass, but colors appear because different wavelengths refract at different angles, separating the spectrum.