Diferencia entre revisiones de «Rayo»

'''Elves''' often appear as dim, flattened, expanding glows around {{mi to km|250}} in diameter that last for, typically, just one millisecond.<ref name="sa">{{Cite web|url=http://www-star.stanford.edu/~vlf/optical/press/elves97sciam/|title=Lightning's strange cousins flicker faster than light itself|accessdate=September 24, 2007|dateformat=mdy|publisher=Scientific American|author=W. Wayt Gibbs for Scientific American}}</ref> They occur in the ionosphere {{mi to km|60}} above the ground over thunderstorms. Their colour was a puzzle for some time, but is now believed to be a red hue. Elves were first recorded on another shuttle mission, this time recorded off [[French Guiana]] on October 7, 1990. Elves is a frivolous [[acronym]] for '''E'''missions of '''L'''ight and '''V'''ery Low Frequency Perturbations from '''E'''lectromagnetic Pulse '''S'''ources.<ref>William L. Boeck, Otha H. Vaughan Jr., R. J. Blakeslee, Bernard Vonnegut and Marx Brook, 1998. The role of the space shuttle videotapes in the discovery of sprites, jets and elves. Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 60, Issues 7-9, p. 669-677.</ref> This refers to the process by which the light is generated; the excitation of [[nitrogen]] molecules due to [[electron]] collisions (the electrons possibly having been energized by the electromagnetic pulse caused by a discharge from the Ionosphere).<ref name="holo" />

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== Datos relevantes ==

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