tag:blogger.com,1999:blog-22973357.post115446473964213832..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Lee Smolin's Trouble with PhysicsSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger67125tag:blogger.com,1999:blog-22973357.post-73571395512349577592007-03-15T09:15:00.000-04:002007-03-15T09:15:00.000-04:00Some of Lee's ideas about future theories are men...Some of Lee's ideas about future theories are mentioned here:<BR/>http://bigbang-entanglement.blogspot.com/Leo Vuyk leovuyk@gmail.comhttps://www.blogger.com/profile/16285797359437018414noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1168003989159074742007-01-05T08:33:00.000-05:002007-01-05T08:33:00.000-05:00Some of Smolin's concerns about freezing time was ...Some of Smolin's concerns about freezing time was already dealt on my blog at http://soi.blogspot.com/2004/09/joseph-palazzo-ghosts-of-physics.htmlJosephhttps://www.blogger.com/profile/00325742921137661641noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1159294774200669982006-09-26T14:19:00.000-04:002006-09-26T14:19:00.000-04:00Look, Pentcho, I strongly have the impression you ...Look, Pentcho, I strongly have the impression you have no idea what you are talking about. You are puzzling together quotations to argue instead of trying to understand differential geometry. Not to mention that all of that does not belong in this comment section. <BR/><BR/>I will try it again: the speed of light in standard relativity is a constant, defined through the lightcone through a point.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1159294224430056112006-09-26T14:10:00.000-04:002006-09-26T14:10:00.000-04:00Hi Pentcho, Einstein's Annalen der Physik papers o...Hi Pentcho, <BR/><BR/><BR/>Einstein's Annalen der Physik papers on what is usually called his Prague theory of gravitation are available online at <A HREF="http://gallica.bnf.fr/" REL="nofollow">gallica.fr</A>:<BR/><I>Über den Einfluß der Schwerkraft auf die Ausbreitung des Lichtes</I> (<A HREF="http://gallica.bnf.fr/ark:/12148/bpt6k15338w" REL="nofollow">Volume 35, 1911, pages 898-908</A>),<BR/>stefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1159252155375961002006-09-26T02:29:00.000-04:002006-09-26T02:29:00.000-04:00Bee wrote: "It is even possible to formulate theor...Bee wrote: "It is even possible to formulate theories with a 'truly' varying speed of light that preserve general covariance, see e.g. papers by Magueijo or Moffat, or better read Joao's book..."<BR/><BR/>Haven't you noticed that Joao's definition of the variability of the speed of light (slower now than in the past) has nothing to do with Einstein's original definition of constancy (the speed ofAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1159130855027288282006-09-24T16:47:00.000-04:002006-09-24T16:47:00.000-04:00Pentcho, Unfortunately I have the impression you a...Pentcho, <BR/><BR/>Unfortunately I have the impression you aren't even trying to listen to what I say. I am pretty damned close to deleting all your nonsensical comments, as they are plainly wrong, and I don't want my blog to contribute to distributing your erroneous believes. <BR/><BR/>Would you please consider for one moment to think about what I say, or otherwise restrain yourself from Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1159080862674665922006-09-24T02:54:00.000-04:002006-09-24T02:54:00.000-04:00SUBTLETY AND BEAUTY IN EINSTEIN'S CRIMINAL CULThtt...SUBTLETY AND BEAUTY IN EINSTEIN'S CRIMINAL CULT<BR/><BR/>http://cfa-www.harvard.edu/Walsworth/pdf/Science_relativity.pdf<BR/>SCIENCE VOL 307 "Special Relativity Reconsidered":<BR/><BR/>"Now, however, some physicists wonder whether special relativity might be subtly - and perhaps beautifully - wrong."<BR/><BR/>Einstein has clearly explained where the subtlety and the beauty come from:<BR/><BR/>Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1159051020216848202006-09-23T18:37:00.000-04:002006-09-23T18:37:00.000-04:00Pentcho, you are mixing up Special with General Re...Pentcho, you are mixing up Special with General Relativity. In the standard version of general relativity the 'local' speed of light (defined through the lightcone) is constant. The global one isn't, because light rays can travel different ways whose lengths (and therefore the duration of the travel) depends on the background curvature, see my above link to the radar echo delay. This is *not* in Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158996466495733142006-09-23T03:27:00.000-04:002006-09-23T03:27:00.000-04:00THE ULTIMATE TROUBLE WITH PHYSICSConcerning the im...THE ULTIMATE TROUBLE WITH PHYSICS<BR/><BR/>Concerning the importance of his second postulate Einstein was quite clear:<BR/><BR/>"If the speed of light is the least bit affected by the speed of the light source, then my whole theory of relativity and theory of gravity is false."<BR/><BR/>It seems there can be no further ambiguity: shatter this postulate and Einstein's world becomes Newton's world Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158598061892450542006-09-18T12:47:00.000-04:002006-09-18T12:47:00.000-04:00Pentcho said...By applying the equivalence princip...<I>Pentcho said...<BR/>By applying the equivalence principle one can easily deduce c'=c+v, where c' is the VARIABLE speed of light in the absence of a gravitational field and v is the relative speed of the light source and the observer. Clearly, the gravitational redshift is fatal for Einstein's theory and modern physics in general. Yet the destroyed human rationality has been misled into Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158477030250667252006-09-17T03:10:00.000-04:002006-09-17T03:10:00.000-04:00EINSTEIN: THE GENIUS AMONG GENIUSES WHO KILLED PHY...EINSTEIN: THE GENIUS AMONG GENIUSES WHO KILLED PHYSICS<BR/><BR/>http://www.pbs.org/wgbh/nova/einstein/genius/<BR/>"Genius Among Geniuses" by Thomas Levenson<BR/>"And then, in June, Einstein completes special relativity, which adds a twist to the story: Einstein's March paper treated light as particles, but special relativity sees light as a continuous field of waves. Alice's Red Queen can accept Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158309249567276222006-09-15T04:34:00.000-04:002006-09-15T04:34:00.000-04:00THE LAST CONVULSION OF EINSTEIN'S CRIMINAL CULTEin...THE LAST CONVULSION OF EINSTEIN'S CRIMINAL CULT<BR/><BR/>Einstein's cult has spent billions of dollars for the destruction of human rationality and the success is remarkable. In 1960 Pound and Rebka measured the gravitational redshift: their result confirmed Einstein's formula c'=c+V/c, where c' is the VARIABLE speed of light in a gravitational field, c is the initial speed of light relative to Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158213576918428772006-09-14T01:59:00.000-04:002006-09-14T01:59:00.000-04:00Hi Sabine,You may not be missing this particular p...Hi Sabine,<BR/><BR/>You may not be missing this particular point but nevertheless the speed of photons either depends or does not depend on the speed of the light source and the dilemma is FATAL for modern physics. <BR/><BR/>PentchoAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158160681144429712006-09-13T11:18:00.000-04:002006-09-13T11:18:00.000-04:00Hi Pentcho,in later chapters you'll find mentionin...Hi Pentcho,<BR/><BR/>in later chapters you'll find mentioning of theories with varying speed of light. I don't think though that this is the point we are missing. Best,<BR/><BR/>SabineSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1158128832358938192006-09-13T02:27:00.000-04:002006-09-13T02:27:00.000-04:00THE ASSUMPTION THAT DESTROYED PHYSICSIn "Beyond St...THE ASSUMPTION THAT DESTROYED PHYSICS<BR/><BR/>In "Beyond String Theory" in his book "The Trouble With Physics: The Rise of String Thory, the Fall of a Science, And What Comes Next" Lee Smolin asks: <BR/><BR/>". . . I believe there is something basic we are all missing, some wrong assumption we are all making. If this is so, then we need to isolate the wrong assumption and replace it with a new Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1157123905351359262006-09-01T11:18:00.000-04:002006-09-01T11:18:00.000-04:00What nobody seems to realize is that String Theory...What nobody seems to realize is that String Theory is such a powerful science, that old notions like "experimental evidence" no longer apply. We've reached the golden age, and for those who desire to live in the past, those who desire a consistent relationship between theory and experiment, well, get out of our way. It's time for the true Enlightenment to begin.a spoonful weighs a tonhttps://www.blogger.com/profile/09488607145931389011noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1156988996317280632006-08-30T21:49:00.000-04:002006-08-30T21:49:00.000-04:00If we look back at Einstein when he was working on...If we look back at Einstein when he was working on General Relativity, he had the physics: Michelsion-Morley, Equivalence Principle, but he had to find the math, which is where Grossman/Riemann came in.<BR/><BR/>Today we have the math, an almost unimaginable pile of it, and we are trying to find the physics.<BR/><BR/>The first is bijective, the latter may not be and thus leads us wildy astray.George Gileshttps://www.blogger.com/profile/03028053060613320029noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1156410223360591252006-08-24T05:03:00.000-04:002006-08-24T05:03:00.000-04:00My new book Quanum Motion also implies that string...My new book Quanum Motion also implies that string theory is incomplete, or even wrong. See my research website http://www.quantummotion.org/Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154888408352144222006-08-06T14:20:00.000-04:002006-08-06T14:20:00.000-04:00Hi Bee,Your review was based on a draft of the boo...Hi Bee,<BR/><BR/>Your review was based on a draft of the book, right? I have not received even a draft yet.<BR/><BR/>In <A HREF="http://www.brasil.gov.br/ingles/" REL="nofollow">Brazil</A>, research in physics and astrophysics has grown tremedously in the past 10 years or so. The quality of research is very good and getting better and better; some universities like <A HREF="http://www2.usp.br/Christine Cordula Dantashttps://www.blogger.com/profile/05271747374185459530noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154816599862019002006-08-05T18:23:00.000-04:002006-08-05T18:23:00.000-04:00lol!Have a nice timeWell give JoAnne my best regar...lol!<BR/><BR/>Have a nice time<BR/>Well give JoAnne my best regards when you speak to her or see herQUASAR9https://www.blogger.com/profile/00593390598251093182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154811671873619442006-08-05T17:01:00.000-04:002006-08-05T17:01:00.000-04:00Hi Quasar, I am about 400 miles South of JoAnne. T...Hi Quasar, <BR/><BR/>I am about 400 miles South of JoAnne. That is, until next month. I am about to chill on a CA beach right now... on my way out the door... With a pile of papers in my bag... Wish I had time for a vacation. Would love to see Hawaii, but I am too busy stomping on Bigfoot's TOEs ;-) <BR/><BR/>B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154810516506244122006-08-05T16:41:00.000-04:002006-08-05T16:41:00.000-04:00By online I mean publicly online at Cosmic Varianc...By online I mean publicly online <BR/>at Cosmic Variance<BR/>Do you not take summer hols, and chill in California beaches?<BR/><BR/>Sometimes, sometimes, sometimes we've got it all and don't appreciate it. That line about bigfoot and waking up in a sweat had me roaring with laughter that is lol!QUASAR9https://www.blogger.com/profile/00593390598251093182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154810308122644332006-08-05T16:38:00.000-04:002006-08-05T16:38:00.000-04:00Hi Bee,Your Technorati is working fineInteresting ...Hi Bee,<BR/>Your Technorati is working fine<BR/>Interesting blogs on your tags too<BR/><BR/>I see you've been debating Graviton 383 with JoAnne on line, are you not working at the same place?QUASAR9https://www.blogger.com/profile/00593390598251093182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154809875263961592006-08-05T16:31:00.000-04:002006-08-05T16:31:00.000-04:00Uncle Al - Lumo, as usual, is not quite correct. ...Uncle Al - Lumo, as usual, is not quite correct. In String Theory the equivalence principle is not a "derived fact" but an approximation who validity can be hoped for. See <A HREF="http://capitalistimperialistpig.blogspot.com/2006/08/no-god-but-strings.html" REL="nofollow">my post</A> for quotes and links.CapitalistImperialistPighttps://www.blogger.com/profile/17523405806602731435noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1154804615911332142006-08-05T15:03:00.000-04:002006-08-05T15:03:00.000-04:00Hi Shantanu,though I find the topic dark matter/en...Hi Shantanu,<BR/><BR/>though I find the topic dark matter/energy very exiting, I won't have much time in the next months to write about it. You might want to look up <A HREF="http://abyss.uoregon.edu/~js/ast123/lectures/lec16.html" REL="nofollow">Schombert's lecture</A>, which is a very readable intro.<BR/><BR/>Hi Christine,<BR/><BR/>I also haven't yet received the copy. I am not even sure it wasSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.com