Please label your axes. Without knowing what these figures represent, your diagrams don't mean anything.
of course they do, it means that light bends upwards. if you put the y axis on the ground (where most people put the x) this is the earth. note that the sun's rays are curving upwards. but OP's post clearly shows that when light moves to a heavier medium, its slope gets steeper.
while clearly when it hits the atmosphere, it should be bending downward.
classic FE debating here. Statement---------Evidence/mechanism-----Proof???
the gap is never completely bridged though, and often times the evidence goes against the claim, and the mechanism is thought to mean proof