• PatFusty@lemm.ee
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    1 year ago

    When im talking about speed of light i am assuming it will be in a perfect vacuum. If this was in ambient under normal conditions, a train going the speed of light would ionize all the air around it causing insane levels of heat.

    So with the thought of it moving in a vacuum, if you look at the portal on a frame by frame basis every nano second you would see either

    1. 1 nano second in his entire body is within some imaginary dimension between the 2 spaces

    2. The body gets infinitely squeezed in 1 space turning them into a mini black hole

    3. They leave the portal at the same rate they came in

    These are my 3 options, i dont see how it can be any other way.

    • Bizarroland@kbin.social
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      1 year ago

      I think that the velocity of the tram has nothing to do with the velocity the people it is running over until it actually runs them over and transfers momentum to them.

      The portal puts a gap in between the tram and the victims, so there is no physical contact to transfer momentum. Momentum is a physical property, it cannot be transmitted without contact.

      Therefore, in a frictionless vacuum the people must keep their original velocity and momentum regardless of the speed of the portal or whatever is pushing it forward.

      If it worked the other way, Chell could not have leapt off of a ceiling and been launched out of the other side in the game. If portals transmit momentum without touch, then Chell would have first impacted an unmoving object with the same force as hitting the floor.

      You can’t have it both left moving objects fly though unimpeded keeping their original momentum and also have unmoving objects suddenly gain momentum from a moving portal.

      The portal does not affect momentum, it is a break in momentum. Momentum does not transfer across portals.

      The momentum stays with the object that passes through the portal.