File:Wolter-types.gif
Wolter-types.gif (237 × 360 pixels, file size: 5 KB, MIME type: image/gif)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:19, 23 January 2008 | 237 × 360 (5 KB) | LouScheffer | {{Information |Description= X-Ray telescope types as described by Wolters |Source=http://imagine.gsfc.nasa.gov/Images/advanced/xray/wolter.gif |Date=23 January 2008 |Author=Rob Petre |Permission= |other_versions= }} In two papers in 1952, Hans Wolter desc |
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