Candle flame, interferometer image

Candle flame, interferometer image

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Credit: DR GARY SETTLES/SCIENCE PHOTO LIBRARY

Caption: Candle flame, interferometer image. Close-up of a candle flame and its hot-air plume, imaged with an optical instrument known as a white-light shearing interferometer. The colour fringes in the candle plume and background are similar to those seen in an oil-slick on water, and are an optical phenomenon known as Newton's rings.

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Keywords: 1, burning, candle, color, colors, colour, colours, combustion, convection, density, flame, flow visualization, fluid dynamics, fringe, fringes, heat, heat transfer, imaging technique, interference pattern, interferometer, interferometry, one, optical, optics, physical, physics, plume, prism, refraction, refractive index, schlieren image, schlieren photography, shearing, single, thermal plume, wollaston prism

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