File:Snell-Descartes.svg
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![File:Snell-Descartes.svg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Snell-Descartes.svg/170px-Snell-Descartes.svg.png?20111008142942)
Size of this PNG preview of this SVG file: 170 × 204 pixels. Other resolutions: 200 × 240 pixels | 400 × 480 pixels | 640 × 768 pixels | 853 × 1,024 pixels | 1,707 × 2,048 pixels.
Original file (SVG file, nominally 170 × 204 pixels, file size: 9 KB)