Structural+color

reflection

color
 * pigment
 * surface layers

fruit
 * [|Brightest Thing in Nature: African Fruit Pollia Condensata] - Biologists have discovered that the Pollia condensata fruit does not get its blue color from pigment but instead uses structural color – a method of reflecting light of particular wavelengths. Cell wall containing cellulose is laid down in layers, forming a chiral structure that is able to interact with light and provide selective reflection of only a specific color. As a result of this unique structure, it reflects predominately blue light. The thickness of the layers determines which wavelength of light is reflected. As a result, some cells have thinner layers and reflect blue; others have thicker layers and reflect green or red.

butterflies

fish

birds - peacock

scarab beetle


 * What's the problem?**
 * **Ask** -
 * **Imagine** -
 * **Design, Build** -
 * **Improve** -


 * That's engineering**
 * [|wavelength] - The distance between the peak and trough of one cycle of a wave of heat, light, or other energy.

>.
 * Engineering ideas**

Challenges for you to work on...
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