Planar Shockwave: Difference between revisions
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* Other supernovae look like this because the brightest ejecta forms a thin shell. You can barely see the part that's coming straight at us, but the edges (where our view is tangent to it) look very bright. [[wikipedia:SN 1987A|SN 1987A]] is a good example of this.
* A recent supernovae picture also serves as a good example of a planar explosion. This one is particularly death-starish. [http://farm4.static.flickr.com/3111/5818422030_a1920a17b0_z.jpg Supernova 1987A]
* As mentioned above, large nuclear explosions can look [https://web.archive.org/web/20130928023555/http://scrapetv.com/News/News%20Pages/Science/Images/massive-nuclear-explosion.jpg something like this]. However, it's just cloudlike condensation as the invisible spherical-ish shockwave passes through layers of the atmosphere where pressure and water content are right. Depending on conditions, this can produce [http://3.bp.blogspot.com/_8adFNycaanI/RiXsoHQ3d8I/AAAAAAAAAFs/FJv_0fHjPG4/s400/Bravo%2Bfireball.bmp multiple stacked rings].
* In the 1950's, the Orion Project studied different ways of directing nuclear explosions. Certain configurations do produce planar outflows of plasma (consider a column of high-density gas in a vacuum. It can only expand towards the sides).
* There are also fireworks that have this sort of effect.
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