Soap Film Colours And Patterns #5 Photograph by Science Photo Library

Soap Film Colours And Patterns #5

by Science Photo Library

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Title

Soap Film Colours And Patterns #5

Artist

Science Photo Library

Medium

Photograph - Photograph

Description

Colours in a soap film. The colours are produced by the interference of light waves reflected from the upper and lower surfaces of the film. As the thickness of the film is of a similar magnitude to the wavelength of visible light (dozens to hundreds of nanometres), the interference patterns appear as bands of colour, related to the thickness of the film. Thicker walls cause interference at longer (redder) wavelengths, so appear bluer and greener. As the film thins through evaporation or other processes, the reflected light cancels out yellow then green then blue light, appearing blue, magenta and golden yellow, before becoming too thin to support itself, and popping.

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October 7th, 2018

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