I'm Confused

Discussion in 'General Philosophy' started by JesusSaves, Nov 20, 2001.

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  1. JesusSaves There is a God Registered Senior Member

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    Hey, I'm just slightly new to this whole web page (found it doing a school project

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    ) and I've been reading through a bunch of these message boards, now I'm totally lost. Could someone please explain how a dimension could exist after the 3rd? I know that the 4th is suposedly time, but I don't even believe that time exists, it is just something invented in order to sell clocks. Anywho, if my question made sense, please reply and help me

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  3. Neb Registered Senior Member

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    I don't believe in time either, I wouldn't say it was invented to sell clocks, I'd say that they only did it to kill some time but what time was there to kill if it wasn't invented.

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    And no i'm not too sure what your reffering too, so sorry I can't really help you, all I can say is that all I know of is 3D and 2D as in what we see, if your talking about gateways in space then your on your own.

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  5. JesusSaves There is a God Registered Senior Member

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    Thanks Neb

    Thanks for the insight

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    and I'm not sure if I am talking about space dimensions or what b/c I am totally lost. I mean, does 2D really even exist? Even something flat, like paper, has a hight (however miniscule it is)

    Can you tell I am a visual learner

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  7. Neb Registered Senior Member

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    Paper is 3d I'd say, I think 2d is not so much what an item is but how we see it.
    If your watching t.v the people on the show a 3 dimensional characters but we can only see them in 2dimensions.
    All dogs not only see everything in Black and white but they also only see in 2D, so even though what they see is 3d there eyes can only distinguish 2 dimensions of the picture.
    Hope this might help a little although i'd say everything i've said you've thought of before.

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  8. JesusSaves There is a God Registered Senior Member

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    Neb

    Hey, I learned something new about dogs today...I didn't know that they only saw in 2D. That's some pretty nifty trivia

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  9. Neb Registered Senior Member

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    Well, i'm pretty sure they do, I hope so, I don't like giving out false info.

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  10. Bobby Lee member Registered Senior Member

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    Wrong info......Dogs

    Dogs see three dimentional, but in a grayscale so to speak.

    The "Rods" and "Cones" in their eye's are disigned that way...


    Some say Black and white but this is incorrect.


    bjl

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  11. Neb Registered Senior Member

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    That sounds about right Bobby Lee thanks for straightening that out, seeings as though i'm having a shocker trying to answer Jesus-saves questions do you want to have a crack at it.

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  12. JesusSaves There is a God Registered Senior Member

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    .....

    Bobby.....thanks for the setting us straight on the whole dog thing, but could we please get back to the dimensions question? I am still really confused, but I think I might get the 2D thing. My theory is (and it is just a theory) that 2D is not what something really is but more of how you see it (okay...Neb came up with that, but it works for me too

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    ) *Thanks Neb! You're my hero*

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  13. Bobby Lee member Registered Senior Member

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    No Thanks

    Yes, many see things in a 2d, it is or it isnt? Im not feeling up to the challange tonight.......unless I have to?

    Im not wussing out, I just have had all excitement for the day I can stand.......lol

    You all are doing fine.


    bjl

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    Last edited: Nov 21, 2001
  14. Neb Registered Senior Member

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    Jesus-Saves, if you would kindly rephrase your question from your original post I might be able to help out a little better, i'm just not sure what it is you would like too know.
     
  15. my_notebook wild hamster Registered Senior Member

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    Jesus Saves:

    I think you do understand the dimensions, but maybe this explanation will help clear some of your questions up.

    The first dimension is a line in space between 2 points. It has no thickness, and the points contained within it have no size. It is an invisible line. The only absolute measurement you can make of this line is it's length.

    Add a third point outside of the line and join each of the end points to it. Now you have a two dimensional plane. You can measure its length and its width. It has no thickness at all.

    The third dimension is a shape, such as a cube or a sphere. You can meaure its length, width and height.

    The fourth dimension is time. Picture a shape moving through space. You cannot actually see the entity in all 4 dimensions, but because of your memory you can see it one moment at a time, and piece together a moving image.

    As far as I know we don't see anything in 1D or in 2D. A piece of string or a piece of paper suffice as models, but they are not true representations. You cannot see a 1 dimensional object because it would not reflect light. A 2 dimensional object doesn't reflect light either, but reflected light cast upon a surface is itself 2D, beacause it has no thickness.

    The image that falls upon your retina is 2 dimensional, but since you have two eyes (hopefully) you get a "stereo" image, and the 2 slightly different points of reference give you depth perception, and allow you to see the third dimension. That's why when you set your stereo to "mono", and the same sound comes from each speaker, you get no sense of depth, but when you set it to "stereo", a properly mixed live recording will allow you to sit in front of the speakers with your eyes closed and "see" where each member of the band is standing.

    Likewise, our sense of the present combined with our memory of the past and our concept of the future allows us to view the fourth dimension, and see things in motion.

    Hope this is helpful.
     
  16. Riomacleod Registered Senior Member

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    Strictly speaking, we exist in n-dimensions. Its just that there are only really 3 physical dimensions, length, bredth, and depth, so those are the ones we most readily experience. If you don't believe that time is, try to go back and change what you wore today. Lemme know if it works :>

    Any more questions, kick 'em my way.

    edit: Oh, and... neb? Dogs see in 3 dimensions.
     
  17. JesusSaves There is a God Registered Senior Member

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    my_notebook
    Thanks bunches

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    Neb,
    as for the ? at the begining......
    I was on another thread and someone said that there are like 26 dimensions. Just wondering if anyone knew what they were.
     
  18. kaptenmossa Registered Member

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    Omg... stupidity...

    Omg, guys seriously, something having three dimensions e.g. width, length, and depth, is a 3d object/space. Something lacking the depth is a 2d object! Tada, was it really that difficult?
     
  19. spidergoat pubic diorama Valued Senior Member

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    If you believe in God, that's another dimension. Where do you think heaven and hell are? Not in 3D space, I think you would agree.
     
  20. Fraggle Rocker Staff Member

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    That is a really difficult question to get an answer on an internet board rather than a large book. And it's even more difficult to get an answer expressed in concepts that are compatible with your level of education. There is no good intuitive way to think about extra dimensions because our entire concept of dimensions is derived from our perception.

    I would suggest that you start by reading the classic book Flatland by Edwin A. Abbott. It was written in 1884 but it's still used in math and computer science classes. Like Alice in Wonderland it's full of satire about Victorian Age society that is still not obsolete, but the author was a very articulate amateur mathematician and he explains the concept of dimensions brilliantly. He creates a world that has only two dimensions and helps us understand how the "people" who live there interact with it and perceive it. By explaining in a very personal way how they would react to the discovery of a third dimension, he makes it possible to expand your own frame of reference and imagine how the existence of a fourth dimension would affect the universe and your life, and even mathematics.

    My point is: the concept you're introducing is not trivial, and it might require this much study to grasp it.

    That said, a couple of decades ago the theory was advanced that the universe has eleven dimensions. The entire dilemma of waves versus particles was resolved by explaining both matter and energy as manifestations in our limited three-dimensional perception of "stuff" vibrating in one of the directions we can't see. Every time it bounces through our "plane," as it were, we observe it. But because it is invisible most of the time its motion is rife with discontinuities. These discontinuities, rendered into mathematical formulae, explain things like relativity and the Heisenberg uncertainty principle and make the physics of the universe a whole lot... well, tidier.
    Time is a dimension, but in your context we should limit ourselves to spatial dimensions and time is not a spatial dimension. But if we were talking about mathematics instead of physics, then yes indeed time is just one more dimension. However many axes you have on your graph in order to chart the values of the variables in your formulas, that is the number of dimensions in the domain you're studying. In studying kinematics (the physics of the motion of objects with mass, for example f=ma) every problem has four variables: x, y, z, and t, where t represents time. So in Physics 101 you're always dealing with a four-dimensional domain.
    This is a science website and you asked a scientific question, even though you asked it on the wrong subforum. (You would have gotten a whole lot more action under Math & Physics and somebody might have even popped up and given you a better answer than mine.) So you are obligated to take science seriously here and not say things like you don't "believe" in time. Time is one of the fundamental properties of the natural universe. You cannot study science without studying time.

    Clocks were invented to measure time, not vice versa. People got tired of calling meetings and having half the attendees show up late.
    As noted, that is incorrect. You can tell how an animal sees by the placement of its eyes. Predators like wolves/dogs (they are a single species) have their eyes on the front of their faces so they have binocular vision, meaning the signals from the two retinas overlap, allowing the brain to do some math and calculate the distance of various objects from their slightly different placement in the two images. Prey animals usually have their eyes more to the sides of their head so they get almost complete 360 degree coverage of the predators trying to sneak up on them. They only have stereoscopic (three-dimensional) vision in the very narrow range where the two fields of view overlap, directly in front of them, allowing them to see the geometry of the terrain and avoid tripping as they evade the predators. This is the basis for the instinct that almost all animals have, including humans. When we see an animal with his eyes on the sides of his head, we know he's not a hunter. He might accidentally stomp us but he's not going to eat us. When we see an animal with his eyes in front, then we instinctively assume he's a predator. A calf who's never seen another animal will run from a lion but not from a zebra. Primates including humans have our eyes in front for a different reason: When you're swinging through the trees you have to be able to see in 3-D in order to judge distances.
    Heaven and hell are components of a supernatural universe. This transcends the laws of the natural universe (including the concept of dimensions), which is the reason it cannot be studied by science. Since there is no empirical evidence of the existence of a supernatural universe, in accordance with the scientific method we are not obligated to treat any hypothesis of such a universe with respect.
     
  21. Xelios We're setting you adrift idiot Registered Senior Member

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    I would also recommend Flatland by Edwin Abbott. The only way I've found to get a grasp of extra dimensions, besides learning a lot of really complicated math, is to imagine what a 3 dimensional world would be like for a 1 or 2 dimensional being. And that book walks you through it very well.

    You could also check out this animation, Imagining the Tenth Dimension. It goes into the Flatland idea very briefly and gives a good overview of what having 10 or more dimensions could mean.
     
    Last edited: Mar 19, 2008
  22. mikenostic Stop pretending you're smart! Registered Senior Member

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    Not to split hairs Fraggle, but wolves and dogs are a different species. Wolves are canis lupus and dogs are canis familiaris. Same genus, different species.
     
  23. Doberman211 Registered Member

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    If you want to understand more about dimensions,i suggest Stephen Hawkings Brief History Of Time and Universe in a Nutshell. I was confused about the whole 11 dimensions thing but after reading them, i understood basicly what the whole question was and the anwer. and for those beleiving the time dimension was invented...:bugeye: you really need to do some research. Time was never invented. as someone said before, instruments were created to tell time.Time existed before our galaxy. I beleive in the Big Bang theory. Some scientists say that time was created at the moment of the big bang. Others beleive it existed before. But they agreed that time before the creation of our universe is not a matter that science is adressed. This can all be found in those two books.

    As for the question of dog vision, they only see in 3d. Their eyes cannot se in 2d and no eyes can see 1d. they can only see some color. They can see: Violet, Indigo, Blue, Yellow, and Red. Green, orange and yellow look all the same to dogs. The problem with them looking at themselves in the mirror is they don't understand what they are looking at. They have fewer cones and more rods in their eyes which means they collect less color but more light. This is why most animals see better in the dark.

    And the reason predators, like us, see 3d is because our eyes are placed about one inch apart. this allows a slightly different view point in each. You can test this by staring at an object and closing one eye and alternating to the next eye. this is depth perception.

    Also,a cool trick with your eyes is t o place your fingers about an inch away from your face and staring at the middle of your fingers and it looks like a sausage. Its an illusion created by depth perception.

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    I hope i cleafed a few things up. And if i copied someone,im sorry but i did not read the entire forum. And if i connected two words together,i apologise but my spacebar does not always work.
     
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