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Flat Earth Q&A / Re: Disappear bottom of objects when they get away
« on: March 10, 2023, 06:58:32 AM »I've seen both argued for.The answer I most frequently see is that light is drawn downwards by the same force we consider to be gravity - so when a ship is on the horizon, the light that reflects off its lower parts will curve into the sea and not reach you, while those parts that are higher will appear closer to the sea.If light curves downwards you would still be able to see the bottom of a ship, just floating higher than it should be (the light ray would basically be a parabola from the ship's bottom to the observer's eyes). It would have to curve upwards for that to happen.
Light curving upwards could make sense under a UA model, light accelerating at the same rate as gravity.
Light curving downwards, I may be misremembering but I think I saw someone object to the orientation changing as light curved. So rather than a smooth arc (like part of an O) they viewed it as:
__---------
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(Okay, you have to reverse the direction, but I think that was the idea - that light travels in a straight line, and the angle of it does not change, but the altitude does)
But yeah, the light models are tricky to dig into as there are so, so many in the forum's history and they all use similar terminology.