3 ms·
> You can see the same effect on land with a tower and an open plain. On land, you could attribute any observed curvature to geology. On water, there does not
by brnt 5y ago
> You can see the same effect on land with a tower and an open plain.
On land, you could attribute any observed curvature to geology. On water, there does not seem to be any other way to explain curvature. I see parents point about how personally verifying is both essential to some (many?) of these critics, and quite hard to do rigorously.
- radford-neal 5y agoIt's not quite that easy. One could suppose that light falls due to gravity. So the light from the bottom of a far-away ship falls into the ocean before it reaches you, leaving only the top of the ship visible to you. I vaguely recall that historically the round shadow of the earth during lunar eclipses was one good piece of evidence.