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How does light travel in a vacuum?

  1. Apr 16, 2005 #1
    How does light travel in a vacuum??

    it is understood that light travels through a medium by interacting with the atoms within that medium but in a vacuum, there are no atoms which, as a result, can't accomodate this interaction, yet light can still travel through...how?

    it has also been brought to my understanding that light doesn't travel as waves... if this is so, then how does light really propagate??
  2. jcsd
  3. Apr 16, 2005 #2
    light is said to have a dual nature. that means that it is said to travel as photons and waves. as for the light traveling through a vaccum, that can be observed through maxwells equations. he hypothesized that an electric field induces a magnetic field. these two fields always run perpindicular of each other with their velocity always being perpendicular to the fields in the x direction. this velocity is attributed to light. thats all i really understand about the propogation of light. the vaccum is free-space. haha, none of this is probably helpful, so ill stop.
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