File:Hydrogen-SpinFlip.svg
![File:Hydrogen-SpinFlip.svg](http://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Hydrogen-SpinFlip.svg/374px-Hydrogen-SpinFlip.svg.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:43, 18 January 2009 | ![]() | 374 × 342 (47 KB) | Tiltec~commonswiki | ({{Information |Description={{en|1=Ground state hyperfine levels of hydrogen (parallel and antiparallel) with the spin-flip transition, emitting radiation at 1420 MHz. The corresponding wavelength is 21 cm. (21-cm line, hydrogen line)}} {{de|1=Wasserstoff |
16:21, 18 January 2009 | ![]() | 374 × 342 (41 KB) | Tiltec~commonswiki | {{Information |Description={{en|1=Ground state hyperfine levels of hydrogen (parallel and antiparallel) with the spin-flip transition, emitting radiation at 1420 MHz. The corresponding wavelength is 21 cm. (21-cm line, hydrogen line)}} {{de|1=Wasserstoff |
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