File:Prisms.jpg
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Prisms.jpg (286 × 393 pixels, file size: 31 KB, MIME type: image/jpeg)
Example of a Fresnel lens used in lighthouses. (Image: terrypepper.com)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:55, 31 October 2017 | | 286 × 393 (31 KB) | Paulo Pacheco (talk | contribs) |
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