• silly goose meekah
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        251 year ago

        I mean, if you zoom far enough, its just a few atoms floating around in mostly nothing.

        Define “flat” and “straight”

        • Buglefingers
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          21 year ago

          Okay! Can do!

          Defnitions: Flat (adjective), My chest. Example My chest was flatter than an angle measured at 180°

          Straight (adjective) anything that has perfect parallelism to my chest. (See notes)

          Notes (Straight): Straight cannot be used as an adjective to describe my sexuality.

          Additional information some users may find helpful: This is satire

          FAQ: Is this commentary on anything political? A: No, this is typically considered bad humor.

          Is this a joke? A: yes, this is a joke just as much as the author of the joke is -entirely.

          Why did you write this? A: I thought of this stupid joke and have no impulse control on writing dumb comments (see previous question)

          What is the meaning of life? A: 42

          Do dinosaurs really exist? A: I had Dino nuggies last night and do not believe big chicken would lie to me about making up dinosaurs, so yes they are real

          Has this joke gone too far? A: This joke is for me, I need to make myself laugh

          • Buglefingers
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            11 year ago

            As a serious note though, on a micro enough scale, everything will become bumpy/not a single linear thing. On a macro enough scale it would be impossible to determine variation and appear flat.

            In a common human sense, many things are flat and linear to normal human perception. Many crystal and metal formations have flat, straight, and sharp features.

            And something theorized to be existing and straight would be (iirc) the planck length. Light so energized that the wave becomes essentially linear (please verify because this is memory only)

  • @Thavron@lemmy.ca
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    591 year ago

    It depends on where you draw the line (heh) on “straightness” and “flatness”. Some planes on gems or geodes are pretty flat, but probably not perfectly flat. Another example is a spider’s web between two points. That’s a pretty straight line if it’s taut, but again, probably not exactly perfect.

  • @tobogganablaze@lemmus.org
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    1 year ago

    Lines and planes in the mathematical sense are 1 and 2 dimensional. They don’t have any height (and lines also no width). So they can’t exist as a physical object made out of atoms as they are already 3 dimensional.

    They only exist as a concept.

    • @angrystego@lemmy.world
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      21 year ago

      The fact that something isn’t a 3d object doesn’t mean it doesn’t exist. Does a line of contrast between 2 colors exist? Does a movie projected at a wall exist?

      • @tobogganablaze@lemmus.org
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        1 year ago

        Does a line of contrast between 2 colors exist?

        I’d say no. And even if it did, those colours are made out a material that consists of atoms that reflect light, both of which are “fuzzy” and 3D and can’t make a proper line.

        Does a movie projected at a wall exist?

        Sure. There is photons bouncing of a wall and the information they carry we call “the movie”. I guess that counts. But the relevant bit is the wall and again it’s made out of atoms and therefore is not a proper flat 2D surface.

        So yeah, I’d say not being 3D does mean something can’t exist in the physical world.

  • @Paragone@lemmy.world
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    271 year ago

    maybe somebody else pointed this out:

    Light ALWAYS travels in its idea of a straight-line.

    Always.

    It doesn’t matter whether it is bent by gravity or refraction, from its perspective, it kept going straight.

    Only an “outside viewer” sees any non-straight-line-ness being done, but the outside-viewer isn’t seeing the curved-space or the curved-refractive-index that the photon saw.

    • @Klear@lemmy.world
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      1 year ago

      Well, kinda, but the trajectory of the photon is contracted into a single point from its POV. Whatever destination is has, it’s already there as far as it’s concerned. It doesn’t experience time given that it’s moving at the speed of light.

  • @MeanEYE@lemmy.world
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    251 year ago

    Short answer, depends on perspective. For example surface of perfectly still lake could be considered flat, but on macro level it follows curvature of the earth. But we still use water to level our buildings, because radius of a planet is so big. On microscopic level it’s anything but flat.

    Someone else mentioned spider silk danging. It’s also another great example, but the same perspective clause applies. But usually crystals and some geological features tend to have flat features.

  • @neptune@dmv.social
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    211 year ago

    You really have to declare to what degree you are asking. You could take a very carefully grown crystal and define a plane based on its lattice structure. But the atoms are not all perfectly placed on the lattice once you zoom in far enough. There’s even gaps between the atoms! A “plane” of carbon looks more like a net to an observer on the scale of those atoms.

    Is an electron a perfect sphere? Scientists probably thought so in 1900 but now ask a physicist and they will say “No, probably not”.

    And yes, as others have stated, our space time is not perfectly Euclidean so that’s another level of uncertainty. How do you measure the small imperfections in a Euclidean model when actual space time isn’t Euclidean?

    As a professor used to tell my class, there are no 0s.

  • @gedaliyah@lemmy.world
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    161 year ago

    No, they are mathematical constructs. Everything in nature is composed of matter and the like, so there are no perfectly straight lines or flat planes.

    Even a beam of light curves and refracts as it interacts with matter and space over a long enough distance.

      • Ada
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        1 year ago

        I asked my good friend gravitational lensing about light in space, and they said that light can go and get bent

        • Zarcher
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          11 year ago

          My understanding is that in a true vacuum light will not be reflected or bent by particles. However, due to gravity bending space time itself, light will follow the curvature of space. It would depend on the observer if the path if light is straight. If you look at the light passing by, it would not be straight under influence of gravity. If light itself is the observer, it will travel in a straight line :)

          In the case of gravitational lensing the observer is looking at light coming in. An outside perspective.

      • @AlDente@sh.itjust.works
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        21 year ago

        There is no perfect vacuum, even in deep space. In the space of our Solar System, there is on average 5 atoms in every cubic centimeter. In interstellar space, there is on average 1 atom every cubic centimeter. In intergalactic space, there is on average 1 atom every 100 cubic centimeters. It’s a gradient, but much like the perfectly straight lines and flat planes in the original question, perfect vacuum is a theoretical construct that is impossible to achieve in our reality.

  • @yarr@feddit.nl
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    161 year ago

    Depending on scale. Is the surface of the lake flat?

    Once you experience true level you will never go back.

    • @bloom_of_rakes@lemm.eeOP
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      41 year ago

      True level must be like true symbols (like, in the idea that there are true names and words. Like a divine language).

      If you have a true level or symbol then you have something, just as good as reality, but manipulable like language. The best of both worlds.

      And even better, you need never leave the confines of the inside of your mind ever again. You can live, within your construct of perfect god-language, and interact with the world from there. Safe and powerful.

      • @kokopelli@lemmy.world
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        21 year ago

        Man… are you good? You sound like a guy who showed up at my house and started saying that the pyramids and stars would aline and tell us the meaning of the universe. Also that açaí berries were the ultimate nutrition. Hope you’re doing okay there.

        • @bloom_of_rakes@lemm.eeOP
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          11 year ago

          “Are you good”. “Hope you’re doing okay there.”. And the rest.

          It’s the modern equivalent of throwing feces.

          You know who does that? Filthy monkeys.

          Don’t be like a filthy monkey.

  • @Audalin@lemmy.world
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    61 year ago

    According to mathematical platonism, yes.

    Otherwise we have no idea. We have some models of physics, none perfectly describing our universe. We don’t know the structure of space, or the structure of time.

    Even if we did: what would it mean for a line or a plane to exist? There could be equivalent descriptions of our universe, some including those as objects and some only as emergent properties.

  • @LouNeko@lemmy.world
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    51 year ago

    A lot of people talk about straightness and flatness as mathematical concepts. But I think OP means it in a technical sense, as in flat like your phone screen or straight as the edges of the screen but in nature. In this sense, flatness or straightness is defined as a finite number of measured points on a surface of which the coordinates all lie between 2 mathematicaly flat/straight parallel tolerance planes/lines. By that definition, depending on what a person would consider flat, say 0.002 mm between the planes/lines, there are definetly naturally occurring crystals that would pass that test.

  • @sarchar@programming.dev
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    41 year ago

    I think we’ve got enough evidence (proof?) that the universe is flat, and straight lines will continue straight forever and never intersect.

    Whether there’s an actual thing that exists that does this? Dunno. Two parallel particles I guess?

    • @webghost0101@sopuli.xyz
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      31 year ago

      I am pretty sure we have no such evidence of the sort. Last i checked the universe being torus/donut shaped was still in the cards.

        • @webghost0101@sopuli.xyz
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          1 year ago

          This is above it “ Current observational evidence (WMAP, BOOMERanG, and Planck for example) imply that the observable universe is flat to within a 0.4% margin of error of the curvature density parameter with an unknown global topology.[1][2] It is currently unknown if the universe is simply connected like euclidean space or multiply connected like a torus. To date, no compelling evidence has been found suggesting the universe has a non-trivial (i.e.; not simply connected) topology, though it has not been ruled out by astronomical observations.”

          I am not going to say i fully understand this stuff but i regularly read into this fascinating stuff.

          The observable universe may from our perspective and all our use cases be completely flat but thats not the same as fully proven and non curving geometric flat.

          Torus shape, weird as is sounds like is still in the cards.

    • @snf@lemmy.world
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      1 year ago

      Aaaaactchhhually a frozen lake would follow the local curvature of the earth, even assuming ideal conditions and crystal formation and so on