<div dir="ltr"><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">OK Spike, so a nothing in the middle of a something is a something, Got it.</div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">Anders: <span style="font-size:12.8px;font-family:arial,sans-serif;color:rgb(34,34,34)">In the standard general relativity view there is a patch of spacetime there, with its own properties (curvature). And there could well be electromagnetic fields (like light on its way through) or more exotic quantum stuff. In quantum field theory "empty" space is a pretty complex thing and the mystery is why it is not heavy and impenetrable.</span><span style="font-size:12.8px;font-family:arial,sans-serif;color:rgb(34,34,34)"> </span></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><span style="font-size:12.8px;font-family:arial,sans-serif;color:rgb(34,34,34)"><br></span></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><span style="font-size:12.8px;font-family:arial,sans-serif;color:rgb(34,34,34)">(Empty should be heavy and impenetrable - got it. I think.)</span></div><br style="font-size:12.8px"><div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">I can tell you that I have tried to teach thousands of empty spaces occupying the craniums of students and can state without equivocation that they ARE impenetrable in many cases. Heavy thinking? Nah. </div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">I do love it when Anders and Clark explain things to me in terms I can understand, though the organ pipe example is a bit fuzzy. </div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">But it's like being a student, I suppose. You think you understand something and then the teacher explains it and you suddenly are totally lost.</div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">bill w</div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Apr 24, 2016 at 7:55 PM, spike <span dir="ltr"><<a href="mailto:spike66@att.net" target="_blank">spike66@att.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="white" lang="EN-US" link="#0563C1" vlink="#954F72"><div><span class=""><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">On 2016-04-24 17:43, William Flynn Wallace wrote:<br><br><u></u><u></u></p></span><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><span class=""><div><p class="MsoNormal"><span style="font-family:"Comic Sans MS""><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Comic Sans MS";color:windowtext">>…</span><span style="font-family:"Comic Sans MS"">Say there is a cube of space (in 'outer' space) that has not one single atom of matter (violating entropy I suppose). Does this mean that it is not in some sense 'space'? Not until some matter is there?<u></u><u></u></span></p></div></span><div><span class=""><p class="MsoNormal"><span style="font-family:"Comic Sans MS"">That there is no 'there' there?<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p></span><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">BillW, in that example there is a there there. The matter outside that cube of space breaks its symmetry, making an inside and an outside. There’s your there there.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p></div></div></blockquote><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><div><p class="MsoNormal" style="margin-right:.5in;margin-bottom:5.0pt;margin-left:.5in"><span style="font-family:"Comic Sans MS";color:windowtext">>…</span><span style="font-family:"Comic Sans MS"">Some say our universe is expanding. Does this mean that some 'potential space' exists beyond any matter that will become 'space' when some matter gets there?</span><span style="font-family:"Comic Sans MS";color:windowtext"><u></u><u></u></span></p><p class="MsoNormal" style="margin-right:.5in;margin-bottom:5.0pt;margin-left:0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p><p class="MsoNormal" style="margin-right:.5in;margin-bottom:5.0pt;margin-left:0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">This one is crazy hard to understand. It isn’t that there is empty space and matter is going out into it. Rather, the space itself is expanding. You can read a hundred different authors explain that concept and it is still mind-bending. But you do need to get your head around it somehow, if you want to move on.<u></u><u></u></span></p><p class="MsoNormal" style="margin-right:.5in;margin-bottom:5.0pt;margin-left:0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p><p class="MsoNormal" style="margin-right:.5in;margin-bottom:5.0pt;margin-left:0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">spike<u></u><u></u></span></p><p class="MsoNormal" style="margin-right:.5in;margin-bottom:5.0pt;margin-left:0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><u></u> <u></u></span></p></div></div></blockquote></div></div><br>_______________________________________________<br>
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