File:Fresnelproef.gif
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![File:Fresnelproef.gif](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Fresnelproef.gif/600px-Fresnelproef.gif?20070625193520)
Size of this preview: 600 × 600 pixels. Other resolutions: 240 × 240 pixels | 480 × 480 pixels | 1,000 × 1,000 pixels.
Original file (1,000 × 1,000 pixels, file size: 35 KB, MIME type: image/gif, looped, 18 frames, 1.4 s)