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Quételet Rings on Mirrors


Quételet Rings can easily be observed on dusty mirrors lit by a torch or halogen lamp - try to dust a mirror with the help of a vacuum cleaner bag, cornflour will also do if it is not too lumpy - a fine experiment for rainy days or winter evenings. The light source must be nearly perpendicular to the mirror. A tripod for the camera also supports a torch while photographing (avoid vibrations, otherwise the image will be unsharp). Try to alter the distance to the mirror - for larger mirrors 2 - 3 m are fine. Candles and your camera’s flashlight also produce good results. If the light source is very close, the coloured stripes will be narrow and numerous, they widen with distance. Different orientations of the light source alter the shape of the rings.


Quételet rings on a mirror. Canon Powershot G6, processed with Adobe Photoshop Elements.

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