• PeriodicallyPedantic@lemmy.ca
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    1 year ago

    It needs to be 2. Otherwise all the people will materialize inside eachother. In fact, everyone will be deposited onto the 2-dimensional pane of the blue portal itself, like an infinitely thing coat of paint, absolutely smearing them.

    Think about it. As your fingertips enter the orange portal, they materialize at the entrance of the blue portal. Then your wrist enters the orange portal, where does it materialize at the blue portal?

    • If your fingers shift to make room, then that has imparted momentum and it’s option B.
    • If you continue to materialize on the other side of the portal like a mirror image, then for all intents and purposes the blue portal is also moving at the same speed as the orange portal, even if orange ring appears still.
    • If your fingertips don’t have momentum and your wrist materializes at the portal, then your wrist is occupying the same space as your fingertips. Congratulations, you’re now a paste.

    For whatever reason I feel more willing to break conservation of momentum than I am to

    • Lizardking27@lemmy.world
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      1 year ago

      Yeah I really think you’ve misunderstood some things. An infinitely thin coat of paint? Are you familiar with the mechanics of the Portal games?

      It would be like dropping a hula hoop over a basketball. Regardless of how fast the hoop falls, the basketball still just sits there.

        • Shiki@lemmy.world
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          1 year ago

          Why?

          Where does the energy even come from?

          A hole/portal doesn’t create or generate energy it just passes things through.

          Just think of it as a hole across space because that is exactly what a portal is.

            • Shiki@lemmy.world
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              1 year ago

              No energy is every transferred as a result of a portal

              You fly in the air if you drop in one because you are carrying momentum downwards that suddenly translates to upwards

              You are sat in the floor, a portal flies towards you. You are sat at the floor at the end, you had no momentum going in and no momentum going out

                • Shiki@lemmy.world
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                  1 year ago

                  Zero fast. There is no energy being transferred to the people, they would plop out and push into each other as they are forced through.

                  If you blocked the stationary portal then the portal moving would essentially just be a wall, no one would go though.

                  This whole relative thing makes no sense, energy isn’t just created because it’s observed by someone else, the door is moving not the people so them sitting there won’t suddenly be catapulted going through a moving portal, where is that energy created?

                  Your wind question is confusing.

                  • PeriodicallyPedantic@lemmy.ca
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                    9 months ago

                    No, the dude is right - if they’re moving “zero fast” upon exiting the portal, then that means they’re either a 2 dimensional paste on the surface of the portal (dead), or they were entirely transported upon contact (cannot partially enter a portal) which is explicitly not how the portals in the game work.

                    This is because: if your hand goes into the portal and appears on the other side, it must move out of the way to make room for your arm. Because it is moving, it has velocity, which means it has momentum. If it doesn’t move out of the way, then you’re now 2 dimensional, and dead.

                    Also, in portal, energy is absolutely created. Every time you portal to a higher place, you gain potential energy that you didn’t have before, without losing any of the other kinds of energy that you had.