Quote:
Originally Posted by puddin'
i can be a bit judgy at times.
what makes colours iridescent?
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From Wikipedia: It is often caused by multiple reflections from two or more semi-transparent surfaces in which phase shift and interference of the reflections modulates the incidental light (by amplifying or attenuating some frequencies more than others). The thickness of the layers of the material determines the interference pattern. Iridescence can for example be due to thin-film interference, the functional analogue of selective wavelength attenuation as seen with the Fabry–Pérot interferometer, and can be seen in oil films on water and soap bubbles. Iridescence is also found in plants, animals and many other items. The range of colours of natural iridescent objects can be narrow, for example shifting between two or three colours as the viewing angle changes, or a wide range of colours can be observed.
Iridescence can also be created by diffraction. This is found in items like CDs, DVDs, or cloud iridescence. In the case of diffraction, the entire rainbow of colours will typically be observed as the viewing angle changes.
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