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{{comic | {{comic | ||
| number = 54 | | number = 54 | ||
− | | date = January 18, 2006 | + | | date = January 18, 2006 |
| title = Science | | title = Science | ||
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| image = science.jpg | | image = science.jpg | ||
− | | titletext = Bonus points if you can identify the science in question | + | | titletext = Bonus points if you can identify the science in question |
}} | }} | ||
==Explanation== | ==Explanation== | ||
− | This | + | This comic is available on a t-shirt from the [http://store-xkcd-com.myshopify.com/products/science-works xkcd stores]. |
− | + | On the front of the t-shirt it says | |
+ | :"Science | ||
+ | :It works, bitches." | ||
− | The theory is that the blackbody in question was the universe at the point when it had cooled down enough {{w|Decoupling (cosmology)|to allow photons to escape}}, {{w| | + | And on the back of the t-shirt is the drawing of the graph from the comic (with a little more details, and without the text written on the front of the shirt) |
+ | |||
+ | On the xkcd store there is both an '''explanation for the title:''' | ||
+ | {{w|Science}}: We finally figured out that you could separate fact from {{w|superstition}} by a completely radical method: {{w|observation}}. You can try things, measure them, and see how they work! {{w|Bitch (insult)|Bitches}}. | ||
+ | |||
+ | And specifically an '''explanation for the graph:''' <!-- DO NOT correct the missing space or missing comma. This is a copy paste from xkcd with errors as noted below. --> | ||
+ | The graph on the back of the shirt is data from the{{w|Cosmic Background Explorer|COBE mission}} which looked at the {{w|cosmic microwave background radiation|background microwave glow of the universe}} and found that it fit perfectly with the idea that the universe used to be really hot everywhere. This strongly reinforced the {{w|Big Bang}} theory and was one of the most dramatic examples of an experiment agreeing with a theory in history -- the data points fit perfectly, with error bars too small to draw on the graph. It's one of the most triumphant scientific results in history. | ||
+ | The only Wiki link that was actually part of the original text on xkcd in the above two excerpts (which are direct copy paste, with possible errors), is the one to the COBE mission. But the link on xkcd is now "broken" since there are now several other {{w|COBE|wiki pages with COBE}} in them. | ||
+ | |||
+ | The solid line represents the theoretical {{w|blackbody radiation|radiation for a blackbody}} at 2.73 K according to {{w|Planck's Law}} (derived as early as 1900 by {{w|Max Planck}}). The theory is that the blackbody in question was in fact the universe at the point when it had cooled down enough {{w|Decoupling (cosmology)|to allow photons to escape}}, and the fact that this light is in the infrared is due to the {{w|redshift}} which becomes stronger the further apart astronomical objects are from each other, due to the expansion of the universe; The back-ground radiation "light" has been traveling since "close" ({{w|Decoupling (cosmology)|380,000 years}}) to the beginning of the universe, so that which is reaching us right now came from very far indeed ({{w|Big Bang|13.8 billion light years}} minus the 0.00038 billion light years, so it was pretty close in comparison). | ||
The title text praises viewers who can identify where this equation and corresponding graph come from (without consulting this wiki, of course). | The title text praises viewers who can identify where this equation and corresponding graph come from (without consulting this wiki, of course). | ||
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==Transcript== | ==Transcript== | ||
− | :[A graph with a curve that begins at zero, then peaks at a given frequency, indicated via a thin vertical line, and then fades down towards zero. It is possible to see the data | + | :[A graph with a curve that begins at zero, then peaks at a given frequency, indicated via a thin vertical line, and then fades down towards zero. It is possible to see the data point, which the curve fits perfectly. The Y-axis are labeled. Along the X-axis the zero point and the frequency where the peak has it's maximum are labeled and close to the arrow the unit of this axis is written.] |
− | : | + | :Y-axis: Energy Density |
− | :Along the | + | :Along the X-axis: |
::0 | ::0 | ||
::160.4 | ::160.4 | ||
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==Trivia== | ==Trivia== | ||
− | * | + | *This is the 48th comic originally posted to livejournal. The previous comic was [[50: Penny Arcade]], the next is [[51: Malaria]]. |
− | * This comic | + | *This comic is available on a t-shirt at [http://store.xkcd.com/products/science-works the xkcd store]. |
{{comic discussion}} | {{comic discussion}} | ||
− | + | [[Category:Comics posted on livejournal| 48]] | |
− | [[Category: | + | [[Category:Posted on LiveJournal after xkcd]] |
− | [[Category:Posted on LiveJournal after xkcd | + | [[Category:Charts]] |
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− | [[Category: | ||
[[Category:Math]] | [[Category:Math]] | ||
[[Category:Physics]] | [[Category:Physics]] | ||
[[Category:Science]] | [[Category:Science]] | ||
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