What would the horizon look like on an infinite plane? I can imagine the growth of a horizon to be similar to a decreasing exponential function. Where the growth of horizon decreases more as the distance away from it increases. See graph below (assume
y is horizon growth and
x is plane length).
But what if the length was infinite? Clearly the horizon can't just keep going up and up, that would be mathmatically impossible. But in the real world if there is a limit, where is it?