PETER APRAHAMIAN / SCIENCE PHOTO LIBRARY. PETER APRAHAMIAN / SCIENCE PHOTO LIBRARY.
Soap bubble landscape: the pattern of colours results from light interference which occurs through reflection in the thin film of the soap bubbles. When the thickness of the film is comparable to wavelength of the incident white light, light waves reflected from back of film may be out of phase with light reaching the front; the result is an interference pattern. The colour results from certain wavelengths comprising white light being extinguished in a region of the bubble where the thickness of the film produces interference effects.
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