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Summary
| Description |
English: Author: User:Stigmatella aurantiaca |
| Date | 8 July 2012 (original upload date) |
| Source | Own work |
| Author | User:Stigmatella aurantiaca |
Source: Own work, created with Inkscape
Description: Why it is difficult to measure the transverse Doppler effect accurately using a transverse beam. The illustration shows the results of attempting to measure the 4861 Angstrom line emitted by a beam of "Canal rays" (a mixture of H1+, H2+, and H3+ ions) as they recombine with electrons stripped from the dilute hydrogen gas used to fill the Canal ray tube. Here, the predicted result of the TDE is a 4861.06 Angstrom line. On the left, conventional Doppler shift results in broadening the emission line to such an extent that the TDE cannot be observed. In the middle, we see that even if one narrows one's view to the exact center of the beam, very small deviations of the beam from an exact right angle introduce shifts comparable to the predicted effect. Ives and Stilwell used a concave mirror that allowed them to simultaneously observe a nearly longitudinal direct beam (blue) and its reflected image (red). Spectroscopically, three lines would be observed: An undisplaced emission lines, and blueshifted and redshifted lines. The average of the redshifted and blueshifted lines is 4861.06 Angstroms.
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
Original upload log
Transferred from en.wikipedia to Commons using For the Common Good.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 06:52, 9 July 2012 | 697 × 246 (220,433 bytes) | w:en:Stigmatella aurantiaca (talk | contribs) | Beams viewed not quite longitudinally |
| 15:08, 8 July 2012 | 697 × 246 (220,243 bytes) | w:en:Stigmatella aurantiaca (talk | contribs) | Degrees too cluttered. Substituting radial lines |
| 08:46, 8 July 2012 | 697 × 246 (235,675 bytes) | w:en:Stigmatella aurantiaca (talk | contribs) | Author: [[User:Stigmatella aurantiaca]] Source: Own work, created with Inkscape Description: Why the transverse Doppler shift cannot be measured accurately using a transverse beam. The illustration shows the results of attempting to measure the 4861 ... |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:19, 14 December 2013 | | 697 × 246 (215 KB) | Stigmatella aurantiaca | Transferred from en.wikipedia: see original upload log above |
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