What if light traveled through space using atoms as the medium for transfer? Space is not empty even in the space between galaxies there are several atoms per cubic meter. For the space between atoms if tiny particles ejected by one atom traveled to other atoms at the speed of light then were absorbed by those atoms and re-emitted again in the same direction at the speed of light, then light would move through space as particles from atom to atom and wave disturbance through the medium as suggested by Einstein when he stated light is both particles and waves. And Heisenberg and Yukawa where convinced there is atom to atom particle exchange in their virtual atom theories of 1927 and 1935. This would begin to explain why light slows down through dense mediums like glass, (more re-emitting and relays) and speeds up again in air and outer space ( less relays). This would explain Michelson and Morleys findings that light is measured at the same speed from all directions in outer space. The speed of light would always be relative to the observer and the atoms around the observer. This is because as light released from a faster moving object, say a distant sun moving toward us, the atoms pass particles and pulse light frequencies to ambient space atoms at the speed of light plus the approaching objects speed, the ambient space atoms absorb the incoming particles but can only re-emit them at the speed of light relative to themselves so a observer surrounded by these ambient atoms would always measure light at the same speed no mater what direction it comes to him from. The observer would how ever see a Doppler shift in the received light. This is do to the ambient atoms receiving particle pulses at the speed of light plus the suns speed, this increases the pulses the ambient atoms receive per second they in turn relay the higher frequency of pulses at the speed of light relative to them selves, a observer sees higher frequency of light shifts, but still at light speeds relative to himself. Youngs' light waves traveling through offset slits experiment could be explained by atom to atom particle relay in that one atom would impart particles to several atoms imparting several more particles to many more atoms and so on, this would allow light passing through a thin slit in a barrier to multiply out enough effecting atoms in the two offset slits of a second barrier where these atoms would absorb and relay particles to more atoms till the light disturbance strike the surface of a screen in a interference pattern. Then there is Einstein thought experiment where you look out the window of a space ship at the speed of light and observe a identical sister ship traveling along side at the same speed but you notice the sister ship has shrunk in length. You call your buddy asking him to look out the window at you and he confirms that your ship has shrunk to. Using the atom to atom transfer idea this would be expected because the light leaving the ship is converted to light speeds relative to ambient space atoms in between the two ship, light reaching the observer on either ship is distorted. Objects not being able to travel faster then light, give relativity people a problem when one talks of several objects moving in different directions at the speed of light. At some point the objects will be traveling faster then the speed of light relative to each other, and the universe cannot move away from these objects at the speed of light simultaneously if we desire to use the objects as stationary references instead of the universe. With atom to atom light transfer this is no problem because objects can travel faster then Lightspeed. Example spaceship traveling any direction in space at near light speed, light inside the ship bounces around inside the ship at light speed from atom to atom plus the ships speed surrounding and carrying the atoms. Light from inside the ship shines out the window into space the moving atoms of the ships window transfers faster then light particle pulses to the first encountered ambient space atoms which increase the light frequency and relay the new light at light speeds relative to themselves. Relativity takes place between atoms to atom transfer and not between objects. What is good is here objects can travel faster the light, just light can not travel faster then light. One other atom to atom light transfer point, if atom to atom light transfer is true then light cannot travel through large atom less space. Obviously there are places in the universe and our galaxy that are void of atoms, like dark matter clouds that cover star fields and do not have gravity affects associated with them. If there were no atoms, for atom to atom light transfer then light would not travel through these areas of space and they would appear to be huge gravity less objects in space. On the plus side dark matter areas of space would be good places for spaceships to go faster then light speeds because there would be no atoms to push through hitting and slowing the ship. The only non relative things in the universe would be the atomic life span of the undiscovered particles (can be found in cosmic rays) that move between atoms (which is a little less then a second), and the distance (around 186,000 miles per sec) that these particles travel before decaying to energy and time. In-other words this comic second and distance would be the same no mater where in the universe it was measured, all other measurements would be relative.

Particles transfering between atoms could explane gravity, nuclear strong, and nucear weak forces.

Photons are the excepted methods of light travel of date. Light leaving the sun as photons traveling the distance to earth like photon bullets. Photons being so small that they travel in the spaces between and through the solar atoms, earth atmosphere atoms, the window atoms of your house, atoms of the room, and through atoms of your eye lenses but can not get around the atoms in the back of your eye where you sense light. Photons are magical in that they can slow down through a twisting glass rod and than speed up on exiting, even through they avoided hitting anything. One photon can become millions otherwise photons leaving a star towards us with only a billionth of a degree difference would be so spread out on reaching us that we would only get a glimpse of them from time to time if at all. I'm wondering which theory I should believe?