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How do probes return signals through the stargate

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    How do probes return signals through the stargate

    If stargate transport is one-way, e.g. opening an outgoing portal from earth to abedos does not allow somebody on abedos to travel through to earth, how is it that the probes the SG1 teams send through to other planets are able to send signals back through the stargate while the outgoing portal is open?

    Thanks!

    #2
    light and radio waves travel both ways through a stargate.
    Never, never, never believe any war will be smooth or easy...

    ... or that any man can measure the tides and hurricanes he will
    encounter on the strange journey.


    Spoiler:

    2 Cor. 10:3-5
    3 For though we walk in the flesh, we do not war after the flesh:
    4 (For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds; )
    5 Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;

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      #3
      Stuff travels through the wormhole both ways, but since it's a rather small wormhole, if matter would get sucked in, it'd be destroyed by tidal effects and atomized. So it's impossible to shovel objects through a wormhole, but it is possible to send through energy as light, radio waves, etc.

      What the gate does is deconstruct matter going in and sends it across the wormhole as information and energy. Matter is reconstituted on the other end. (There are also buffers, but that's not important here.) For some reason, ancients decided that the deconstruction-reconstruction should only work in one direction, to send matter from origin gate to destination gate. Objects going in reverse get deconstructed, but not sent across. So it's a very bad idea to try and go backwards.
      MWG Gate Network Simulation

      Looks familiar?

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        #4
        Originally posted by Ltcolshepjumper View Post
        light and radio waves travel both ways through a stargate.
        Why exactly? Why light and radio but not matter? According to what?

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          #5
          Originally posted by K^2 View Post
          Stuff travels through the wormhole both ways, but since it's a rather small wormhole, if matter would get sucked in, it'd be destroyed by tidal effects and atomized. So it's impossible to shovel objects through a wormhole, but it is possible to send through energy as light, radio waves, etc.

          What the gate does is deconstruct matter going in and sends it across the wormhole as information and energy. Matter is reconstituted on the other end. (There are also buffers, but that's not important here.) For some reason, ancients decided that the deconstruction-reconstruction should only work in one direction, to send matter from origin gate to destination gate. Objects going in reverse get deconstructed, but not sent across. So it's a very bad idea to try and go backwards.
          I agree that energy in wave form (EM/Light/As yet unprovable Gravitational/Temporal) can travel both ways but have we ever actually seen someone try to go backwards through the gate? Do they get deconstructed or do they just pass through the event horizon and come out the back of the same gate unaffected?
          sigpic

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            #6
            Originally posted by TrueLordOfNetu View Post
            I agree that energy in wave form (EM/Light/As yet unprovable Gravitational/Temporal) can travel both ways but have we ever actually seen someone try to go backwards through the gate? Do they get deconstructed or do they just pass through the event horizon and come out the back of the same gate unaffected?
            Yeah, remember one of the early SG-1 episodes where Jack gets stuck on a different planet because an asteroid buries the gate? When SGC try to dig it out, the probe gets destroyed because it falls back into the gate. Carter also talks about it in a few other places.

            Also, the deconstruction pretty much has to happen in order for the buffer system to work properly. Imagine a person emerging through the gate. Blood could be traveling into the gate, but since the person is still in the buffer, it simply ends up traveling into the simulated space within the buffer. If blood didn't get deconstructed and sent to buffer, it'd be rather messy. Even if it takes a very short time to emerge, we are talking about a cut the size of your whole body.

            A person who steps completely back into the portal will be entirely within the buffer, at which point the simulation is frozen, trapping that person there. That is until the connection is severed and the buffer is flushed, effectively destroying that person. Based on this, I'm guessing, that it would be entirely harmless to put your hand through the portal from either side. As long as you don't step completely through, you should be fine.

            Buffer seems to work the same way on both sides, but the contents of the buffer are sent from gate-to-gate only in the origin-to-destination direction. This seems a rather arbitrary design decision, because the operation of the gate is otherwise symmetric. This does, however, prove extremely useful when exploring worlds through the gate system, making sure that something bad on the other side doesn't come through as soon as you open the portal. This might be the reason for this design decision, and I wonder if there is a way to "reprogram" the gates to allow a two-way connection when the wormhole is established.
            MWG Gate Network Simulation

            Looks familiar?

            Comment


              #7
              the ancients decided it would be bad if you walk through it simultaniously. either that, or the technology makes it impossible. perhaps because the matterstream from beaming would interfere with the other coming from the other side. in case of radio signals, its not that bad as its photon based and thus it wont screw up other photons

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                #8
                You might have a point on interfering matter streams. I was only thinking about information about matter assembly and energy being sent through, but if you also send the original matter as some high energy plasma, it would make things a lot easier.
                MWG Gate Network Simulation

                Looks familiar?

                Comment


                  #9
                  Why exactly? Why light and radio but not matter? According to what?
                  Because light and radio waves are neither alive nor physical...

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                    #10
                    Light's not physical? That's new.
                    MWG Gate Network Simulation

                    Looks familiar?

                    Comment


                      #11
                      Originally posted by K^2 View Post
                      Light's not physical? That's new.
                      It's radiation.

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                        #12
                        And what, radiation isn't physical either? There must be a lot of Physicists wasting their time studying such things. You guys should go tell them that.
                        MWG Gate Network Simulation

                        Looks familiar?

                        Comment


                          #13
                          I'd say physical is the wrong word. The energy waves are able to pass through as the are non-complex, ie. they consist of a single particle type and so require no dematerialisation/rematerialisation to travel through wormholes. It is a similar concept to that seen in Red Sky where an element will emerge unchanged from a wormhole that has been disengaged early whereas a person or even a simple compound would remain atomised.
                          sigpic

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                            #14
                            Yeah. That's what I'd go with. Though, a small wormhole connecting gates that are thousands of light years apart could have tidal forces extreme enough to go beyond simple atomization of matter. Matter stream might traverse the wormhole as simple plasma, nucleon plasma, or even quark-gluon plasma.
                            MWG Gate Network Simulation

                            Looks familiar?

                            Comment


                              #15
                              ...ummm space magic?

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