wendy wrote:A very good book on how two dimensions work is William Poundstone's 'Planiverse'. It gets down to things like terrifying flying snakes and rivers. A "river" is an overland flood, when you think about it. I mean if you go from A to B, you cover every point between A and B.
A 2D room is pretty much held up by its doors. You can't open both doors, otherwise the roof would fall down.
Still can't envision what it would be like not to have it, though
Eric B wrote:In 1D also; what does it mean to see only depth? That's even harder to imagine!
Your whole field of vision is just a single point, and not even a point like period, but a point having no height or width at all; and even if you could see it, it wouldn't look like a point, because you're not even aware of the existence of height or width!
anderscolingustafson wrote:In 1d light wouldn't have any space to dilute so something that was far away would be just as bright as something close by as the light wouldn't dilute with distance. In 1d an object 1 meter away would look the same as an object 1 light year away.
quickfur wrote:<br abp="650">Hmm. You're right! And if there was gravity in 1D, it wouldn't dilute either, so over time, all the mass in the 1D universe will compress together into a giant line, and gravity would be so strong nothing could stand upright on either end. So nothing interesting could exist other than the universal line segment that contains all of the mass in the universe.anderscolingustafson wrote:In 1d light wouldn't have any space to dilute so something that was far away would be just as bright as something close by as the light wouldn't dilute with distance. In 1d an object 1 meter away would look the same as an object 1 light year away.
anderscolingustafson wrote:quickfur wrote:<br abp="650">Hmm. You're right! And if there was gravity in 1D, it wouldn't dilute either, so over time, all the mass in the 1D universe will compress together into a giant line, and gravity would be so strong nothing could stand upright on either end. So nothing interesting could exist other than the universal line segment that contains all of the mass in the universe.anderscolingustafson wrote:In 1d light wouldn't have any space to dilute so something that was far away would be just as bright as something close by as the light wouldn't dilute with distance. In 1d an object 1 meter away would look the same as an object 1 light year away.
If Gravity doesn't dilute would it still act as an attractive force between two objects? If gravity was the same everywhere then how would an object even "Know" to go in the direction of the other object when the gravity would be the same on either side of it?
quickfur wrote:You can't see depth in 1D, because it's impossible to have stereoscopic vision. So sight becomes pretty meaningless in 1D. Fortunately, you don't need sight in 1D anyway, since you can only ever have two neighbours, and they will be your neighbours your whole life (unless they die first)
anderscolingustafson wrote:Part of the reason you can't see depth in 1d is that depth perception requires the ability to triangulate using two eyes. We detect depth because there is a slight difference between the position we see things in using both our eyes. In 1d you couldn't have two eyes next to each other and so you wouldn't be able to use triangulation to tell how far something is.
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