Quote from: markjo on January 19, 2014, 02:35:00 AM

Quote from: Tintagel on January 18, 2014, 09:41:08 PM

Quote from: markjo on January 18, 2014, 09:37:36 PM

Quote from: Tintagel on January 18, 2014, 09:04:29 PM

The sun isn't ever anywhere near the horizon.

No, but the horizon is.  Sunlight travels from the sun, illuminates the horizon and travels to your eye.  So, are you suggesting that sunlight bends as it travels from the sun to the horizon, but travels straight from the horizon to your eye?

No, actually, light from the horizon drops first, and then bends upward.  See the second graphic with the trees.  This accounts for the "sinking ship" effect, and has a pesky tendency to make the earth look round.

  Why would the light from the horizon drop at all?  Isn't the EA only supposed to cause an upward bending?

It does, but the acceleration of light (or, more accurately the jerk, or the rate at which its acceleration changes) happens at a different rate than the earth, so at first the earth "catches up" with the light that is traveling horizontally, like light from a tree, and then it accelerates faster and curves upward.  These are the calculations I'm working on, in fact, trying to determine not only the acceleration, but the jerk and impulse of EM radiation due to UA / DE.

I know this does not count as a perfectly credible source but the folks over at reddit have something to say about photon acceleration: http://www.reddit.com/r/askscience/comments/1der30/when_a_photon_is_emitted_from_an_stationary_atom/