User:Christopher Thomas/Image contributions#Emission spectra
This page lists thumbnails of noteworthy images I've contributed to Wikipedia. If you find them useful for Wikipedia articles you're editing, by all means link them or make prettier derivatives of them. Unless otherwise noted, they're licensed under the Creative Commons share-alike license.
General relativity
| Image:Bh-light-cones-1.png
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| Image:Event-horizon-particle.png containing the world line of a uniformly accelerating particle, P, and the light cone of an event, E. The event's light cone never intersects the world line of the particle; the event is therefore beyond an event horizon perceived in the particle's accelerating reference frame.]]
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| Image:Gr-temp-positive.gif
| Image:Gr-temp-negative.gifs. The world lines are plotted with position measured with respect to the blue test object (its position is treated as constant), to show tidal effects. There are two world lines that pass through point X on the spacetime diagram, and none of these intersect the worldline of the blue test object. This drawing of multiple lines that don't intersect the blue world line indicates that spacetime is negatively curved.]] |
Special relativity
Emission spectra
These were generated during a thread at WT:PHYS regarding how best to format diagrams of image spectra. The script used to generate the SVG figures is here.
| Image:Spectrum_test_cjt_H.svg of hydrogen (from NIST data).]]
| Image:Spectrum_test_cjt_He.svg of helium (from NIST data).]] |
| Image:Spectrum_test_cjt_Mg.svg of magnesium (from NIST data).]]
| Image:Spectrum_test_cjt_Xe.svg of xenon (from NIST data).]] |
Other
| Image:Hcube fold.gif of a hypercube (left) and cube (right).]]
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| Image:Forward-sailcraft-scheme.png's scheme for slowing down an interstellar light-sail in the destination star system.]]
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Scans of very old scientific publications
I'm lucky enough to have the Toronto Reference Library on my doorstep, which specializes in very old published works. As a result, I've contributed scans of works whose copyright has expired. Copyright information is given in the text associated with the image files.
=[[Arthur Schuster]]'s "Potential Matter" letters=
This pair of letters was written in 1898, and is relevant to the history of the concepts of antimatter and negative mass.
| Image:Schuster potential matter 1.png by name.]]
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| Image:Schuster potential matter 2a.png.]]
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