Soap films on a cube

Soap films on a cube

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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Soap film on a cube frame. Soap bubbles form sheets of minimum surface area when stretched between two points. Therefore, when stretched between straight metal wires they will form flat planes. The iridescent bands are caused by reflected light interfering with itself. The differing colours are due to gradients of thickness in the film, caused by gravity.

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Keywords: bubble, chemical, chemistry, clinging, coat hanger, cube, cube frame, effects, interference, iridescent, light, liquid, mathematical, mathematics, physical, physical effect, physics, rainbow, soap film, wire

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