Wing scales cause light to diffract and interfereMorpho butterflies
Wings of Morpho butterflies create color by causing light waves to diffract and interfere.
Body surfaces reflect light to create colorsjewel beetles
The body surfaces of jewel beetles and other beetles create colors by reflecting lights at different wavelengths.
Leaves focus lightbegonias
The leaves of begonias maximize photosynthesis in low-light conditions by using clear surface cells to focus light.