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  3. What is anti-light-speed?

What is anti-light-speed?

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  • E ensger

    As we know, light speed is the fastest speed we know. But I have a question. What is the most slowly speed we know?

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    Super Lloyd
    wrote on last edited by
    #48

    that depends....

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    • J Jorgen Sigvardsson

      Drew Stainton wrote:

      In one dimension you could have [-c].

      Huh? How could that be?

      -- 100% natural. No superstitious additives.

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      David Stone
      wrote on last edited by
      #49

      Look at it like this. There is a one dimensional line. The fastest anything can go is the speed of light. It's velocity is a speed associated with a direction. Thus the highest velocity is straight forward at the speed of light. Like so: (The double arrows is the vector)

      |---------------------|========================>|
      -c                    0                         c

      Now, the lowest speed is 0. You can't go slower than no speed at all. But the lowest velocity is -c, because of the directional component. You'd be travelling straight backwards at the speed of light. Like so:

      |<====================|-------------------------|
      -c                    0                         c

      And when we saw the computer, when we saw its code - and Turing saw it first - we were looking at complexity incarnate. And then suddenly we saw complexity everywhere. It materialized, it crystalized around us - even though it had always been there.
      We have yet to recover from the shock.

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      • D David Stone

        Look at it like this. There is a one dimensional line. The fastest anything can go is the speed of light. It's velocity is a speed associated with a direction. Thus the highest velocity is straight forward at the speed of light. Like so: (The double arrows is the vector)

        |---------------------|========================>|
        -c                    0                         c

        Now, the lowest speed is 0. You can't go slower than no speed at all. But the lowest velocity is -c, because of the directional component. You'd be travelling straight backwards at the speed of light. Like so:

        |<====================|-------------------------|
        -c                    0                         c

        And when we saw the computer, when we saw its code - and Turing saw it first - we were looking at complexity incarnate. And then suddenly we saw complexity everywhere. It materialized, it crystalized around us - even though it had always been there.
        We have yet to recover from the shock.

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        Jorgen Sigvardsson
        wrote on last edited by
        #50

        That's no different from any n-dimensional space, where n > 2. In all cases, the speed would still be c. Sure, from an abstract mathematical point of view, then the speed (or magnitude of the vector) could be negative. But a negative speed is ludicrous (at best) in the physical world. The direction is what's relevant.

        -- 100% natural. No superstitious additives.

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        • J Jorgen Sigvardsson

          That's no different from any n-dimensional space, where n > 2. In all cases, the speed would still be c. Sure, from an abstract mathematical point of view, then the speed (or magnitude of the vector) could be negative. But a negative speed is ludicrous (at best) in the physical world. The direction is what's relevant.

          -- 100% natural. No superstitious additives.

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          Andy Brummer
          wrote on last edited by
          #51

          Actually it's one of the topological features of one dimension that there are 2 distinct directions which cannot be continously connected without changing their magnitude. In all higher dimensions you can continously transform any 2 vectors of the same magnitude and type into each other without changing the magnitude. [edit] Just like strings can only be tied in 3 dimensions. In all higher dimensions there is enough freedom of movement that they can always untangle themselves. [/edit]


          I can imagine the sinking feeling one would have after ordering my book, only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon

          -- modified at 19:36 Saturday 24th June, 2006

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          • C Chris Maunder

            We've done a few 15% and on Tuesday we're doing a stupid 2km, 24.5%. I just look inside for my happy place and hope my knees don't explode. cheers, Chris Maunder

            CodeProject.com : C++ MVP

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            Graham Bradshaw
            wrote on last edited by
            #52

            Chris Maunder wrote:

            We've done a few 15% and on Tuesday we're doing a stupid 2km, 24.5%.

            Please tell me you've got a triple on the front, and an MTB wide-range cassette on the rear...

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            • J Jorgen Sigvardsson

              That's no different from any n-dimensional space, where n > 2. In all cases, the speed would still be c. Sure, from an abstract mathematical point of view, then the speed (or magnitude of the vector) could be negative. But a negative speed is ludicrous (at best) in the physical world. The direction is what's relevant.

              -- 100% natural. No superstitious additives.

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              Ryan Binns
              wrote on last edited by
              #53

              I thought he clearly said that the lowest speed is 0, but the lowest velocity (taking direction into account) is -c...

              Ryan

              "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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              • R Ryan Binns

                I thought he clearly said that the lowest speed is 0, but the lowest velocity (taking direction into account) is -c...

                Ryan

                "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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                Jorgen Sigvardsson
                wrote on last edited by
                #54

                I just don't see how a vector could be negative. -c is just c in some opposite direction. The lowest velocity is zero - meaning zero movement. Any speed in any direction, any velocity in other words, means movement, and is therefore "higher" than zero.

                -- 100% natural. No superstitious additives.

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                • E ensger

                  But 0 is no speed - it's only 0. What is above 0 and and slowly enough:confused: I once heared an answer that fascinated me - speed is relative to you. So the answer was 'your body'. And that's true;P I never moved in front or bhind my body:laugh: But 0 - thats too simple in my mind

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                  Lost User
                  wrote on last edited by
                  #55

                  ensger wrote:

                  What is above 0 and and slowly enough

                  1E-99?;P Paul

                  Where are you?[^] How much time is left?[^]

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                  • C Chris Maunder

                    It felt like it today! We did Mont Ventoux[^] this morning and while the ascent hurt a little the descent - using the entire road since there was no traffic - was insane. I'm still trying to get the grin off my face. Galibier[^] on Monday. cheers, Chris Maunder

                    CodeProject.com : C++ MVP

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                    Lost User
                    wrote on last edited by
                    #56

                    My goodness, that looks beautiful!! I'm going to have to copy you (your actions at least) someday!! :-D

                    Paul

                    Where are you?[^]
                    How much time is left?[^]

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                    • L Lost User

                      So if you travel faster than light you are doing C++? :laugh: The tigress is here :-D

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                      Lost User
                      wrote on last edited by
                      #57

                      No, c++ - assuming C is heat capacity ;P I know I know, C isn't a constant ;P Paul

                      Where are you?[^] How much time is left?[^]

                      -- modified at 20:36 Saturday 24th June, 2006

                      Last modified: zaterdag 24 juni 2006 19:33:11 --

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                      • J Jorgen Sigvardsson

                        I just don't see how a vector could be negative. -c is just c in some opposite direction. The lowest velocity is zero - meaning zero movement. Any speed in any direction, any velocity in other words, means movement, and is therefore "higher" than zero.

                        -- 100% natural. No superstitious additives.

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                        Ryan Binns
                        wrote on last edited by
                        #58

                        Jörgen Sigvardsson wrote:

                        Any speed in any direction, any velocity in other words, means movement, and is therefore "higher" than zero.

                        Higher in magnitude, therefore higher in speed. Velocity is a vector relative to a certain direction, so velocity in one direction is the -ve of the velocity in another direction. If your velocity reference is a vector pointing directly ahead of you, then an object moving away from you has positive velocity, and an object moving towards you has negative velocity, although its speed will be positive. So what Chris originally said is true, an object moving at light speed toward you by convention has a velocity of -c, but a speed of c.

                        Ryan

                        "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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                        • G Graham Bradshaw

                          Chris Maunder wrote:

                          We've done a few 15% and on Tuesday we're doing a stupid 2km, 24.5%.

                          Please tell me you've got a triple on the front, and an MTB wide-range cassette on the rear...

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                          Chris Maunder
                          wrote on last edited by
                          #59

                          No, but I did wimp out and get a compact crank. :-> cheers, Chris Maunder

                          CodeProject.com : C++ MVP

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                          • E ensger

                            As we know, light speed is the fastest speed we know. But I have a question. What is the most slowly speed we know?

                            G Offline
                            G Offline
                            Gary R Wheeler
                            wrote on last edited by
                            #60

                            I know of a squirrel on the side of the road who's the World's Slowest Squirrel. He's been about to cross the road for several weeks now. Does that qualify?


                            Software Zen: delete this;

                            Fold With Us![^]

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                            • J Jorgen Sigvardsson

                              About twice the size of a quarter of string.

                              -- 100% natural. No superstitious additives.

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                              G Offline
                              Gary R Wheeler
                              wrote on last edited by
                              #61

                              Only for average values of 2. For extremely small or extremely large values of 2, it would be smaller or larger, respectively.


                              Software Zen: delete this;

                              Fold With Us![^]

                              1 Reply Last reply
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                              • C Chris Maunder

                                It felt like it today! We did Mont Ventoux[^] this morning and while the ascent hurt a little the descent - using the entire road since there was no traffic - was insane. I'm still trying to get the grin off my face. Galibier[^] on Monday. cheers, Chris Maunder

                                CodeProject.com : C++ MVP

                                G Offline
                                G Offline
                                Gary R Wheeler
                                wrote on last edited by
                                #62

                                Chris Maunder wrote:

                                Mont Ventoux ... Galibier

                                Oh. My. God. <Wayne_Campbell_voice[^]> We're not worthy! We're not worthy! We're not worthy! </Wayne_Campbell_voice>


                                Software Zen: delete this;

                                Fold With Us![^]

                                1 Reply Last reply
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                                • E ensger

                                  But 0 is no speed - it's only 0. What is above 0 and and slowly enough:confused: I once heared an answer that fascinated me - speed is relative to you. So the answer was 'your body'. And that's true;P I never moved in front or bhind my body:laugh: But 0 - thats too simple in my mind

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                                  El Corazon
                                  wrote on last edited by
                                  #63

                                  ensger wrote:

                                  What is above 0 and and slowly enough

                                  watching a white cedar grow on a cliff in canada....[^] however, for practical purposes, I am sure you can watch grass grow and it will feel just as slow. _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

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                                  • L Lost User

                                    ensger wrote:

                                    What is above 0 and and slowly enough

                                    1E-99?;P Paul

                                    Where are you?[^] How much time is left?[^]

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                                    E Offline
                                    El Corazon
                                    wrote on last edited by
                                    #64

                                    Paul van der Walt wrote:

                                    1E-99?

                                    not slow enough! ;P long double : exp:15 mant:64 Quadruple: exp: 15 mat: 112 _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

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                                    • C Chris Maunder

                                      No - it doesn't work like that :) Heisenberg's principle (in part) means dx.dp >= h_bar/2, where dx is uncertainty in position and dp is uncertainty in momentum. If we assume a unit mass then we have dx.dv >=h_bar/2. => dv >= h_bar/(2.dx) (h_bar = planck's constant / pi) So the bigger your uncertainty in exactly where you are, the less your uncertainty about your velocity. So you can say the velocity of an object is as close to 0 as you want. You just have no idea where you left it. cheers, Chris Maunder

                                      CodeProject.com : C++ MVP

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                                      El Corazon
                                      wrote on last edited by
                                      #65

                                      Chris Maunder wrote:

                                      So you can say the velocity of an object is as close to 0 as you want. You just have no idea where you left it.

                                      So you are saying that the slowest speed is the pair of binoculars I lost at Taos at the age of 5? _________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

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                                      • C Chris Maunder

                                        No - it doesn't work like that :) Heisenberg's principle (in part) means dx.dp >= h_bar/2, where dx is uncertainty in position and dp is uncertainty in momentum. If we assume a unit mass then we have dx.dv >=h_bar/2. => dv >= h_bar/(2.dx) (h_bar = planck's constant / pi) So the bigger your uncertainty in exactly where you are, the less your uncertainty about your velocity. So you can say the velocity of an object is as close to 0 as you want. You just have no idea where you left it. cheers, Chris Maunder

                                        CodeProject.com : C++ MVP

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                                        Lost User
                                        wrote on last edited by
                                        #66

                                        Chris Maunder wrote:

                                        No - it doesn't work like that :) Heisenberg's principle (in part) means dx.dp >= h_bar/2, where dx is uncertainty in position and dp is uncertainty in momentum. If we assume a unit mass then we have dx.dv >=h_bar/2. => dv >= h_bar/(2.dx) (h_bar = planck's constant / pi)

                                        Now your just showing off with all that algebra and big words. And to think you started off in Canberra making mud pies from memory. Michael Martin Australia "I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible." - Mr.Prakash 24/04/2004

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                                        • L Lost User

                                          Chris Maunder wrote:

                                          No - it doesn't work like that :) Heisenberg's principle (in part) means dx.dp >= h_bar/2, where dx is uncertainty in position and dp is uncertainty in momentum. If we assume a unit mass then we have dx.dv >=h_bar/2. => dv >= h_bar/(2.dx) (h_bar = planck's constant / pi)

                                          Now your just showing off with all that algebra and big words. And to think you started off in Canberra making mud pies from memory. Michael Martin Australia "I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So I had to leave the place as soon as possible." - Mr.Prakash 24/04/2004

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                                          C Offline
                                          Chris Maunder
                                          wrote on last edited by
                                          #67

                                          modelling mud pies, thank you very much. Poorly, too. cheers, Chris Maunder

                                          CodeProject.com : C++ MVP

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