Iridescence in insects

Iridescence is when surfaces – such as the wings of butterflies – appear to change brightness and colour as the angle of view, or the angle of illumination, changes. The iridescent wings of Morpho butterflies are some of the best examples. The spectral reflectance changes with the angle of incidence – i.e. the viewing angle…

Butterflies with black wings

Black. We all know what it is. The absence of light; the opposite of white. But are there gradations of black? Are some blacks blacker than others? The answer is most assuredly yes, and scientists have recently developed super black products with incredibly efficient light absorbing properties. For example, Vantablack – a material developed by…