iridescence

Grey is Gray

“Light waves, like ocean waves, have peaks and valleys (crests and troughs). Red light has the longest wavelength and violet the shortest.

All waves, including light, have a curious property: if two waves combine, the waves can meet each other crest-to-crest, adding up and reinforcing the effect of each other, or they can meet crest-to-trough, cancelling each other out so that they have no effect. When they meet crest-to-trough, for every “up” vibration in one wave, there is a corresponding “down” vibration in the other wave. This combination of equal ups and downs causes complete cancellation or interference. Interference is responsible for the pearly luster of an abalone shell, the beautiful colors in some bird feathers and insect wings, and the flowing patches of color in an oil slick on the street after a rain shower – and for the color of bubbles. ”

Iridescence is interference

intersecting points of time and space in Indra’s net

manifesting every one bright pearl, every river, every mountain

cancellation dissolves barriers.

grey is gray,

bubbles made of soap wash nothing away.

warped images in whatever dimension conceived.

nevertheless, light is light; even in the darkness where rivers flow

POP !

Definition: Iris diaphragm–nounOptics, Photography

a composite diaphragm with a central aperture readily adjustable for size, used to regulate the amount of light admitted to a lens or optical system.

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