Atomic_Clock-Louis_Essen.jpg (620 × 360 pixels, file size: 73 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:53, 7 November 2016 | 620 × 360 (73 KB) | Tholme | Higher quality from http://www.npl.co.uk/upload/img/essen-experiment_1.jpg | |
17:02, 21 December 2008 | 274 × 169 (13 KB) | Coenen | {{Information |Description={{en|1=Louis Essen standing next to the world's first atomic clock (1955)}} |Source=http://www.npl.co.uk/upload/img_400/atomic_clock.jpg |Author=National Physical Laboratory |Date=1955 |Permission= |other_versions= }} == Licensi |
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