Can we detect a blueshift of -c?
in [Physics]
|
Prev: The best we can get for a standard model
Next: A blue·shifted photon is “spun up”; its frequency goes up.
From: BURT on 23 Apr 2010 01:27 On Apr 22, 9:31 pm, Brad Guth <bradg...(a)gmail.com> wrote: > On Apr 22, 1:33 pm, "Greg Neill" <gneil...(a)MOVEsympatico.ca> wrote: > > > > > > > Brad Guth wrote: > > > How about photons from a vibrant 10 solar mass star that's situated > > > well within our visual detection horizon of 13.7e9 ly, but trekking > > > directly towards us at -c? > > > It can't. Nothing physical within our horizon can be > > observed to move at or above c. Close to c, sure, but > > not at or above. > > > The best a body can do is approach c with respect to > > observers in its proximity (within the local region of > > space moving with the Hubble flow). Every non-local > > observer (such as us sitting a great distance away from > > that region in our own local region) sees that region > > of space moving away in bulk according to the Hubble > > expansion, thus decreasing any net speed of approach. > > I wasn't asking for your subjective opinion of physics. > > I was asking about photons from a vibrant 10 solar mass star that's > situated well within our visual detection horizon of 13.7e9 ly, > trekking directly towards us at -c. How would we ho about detecting > this 100% blue-shift? > > ~ BG- Hide quoted text - > > - Show quoted text - What if you are moving sideways to light when absorbing it? What shift is it going to have? There must be a maximum energy shift with drop off at different angles of absorption. Mitch Raemsch
From: Brad Guth on 23 Apr 2010 01:41 On Apr 22, 10:27 pm, BURT <macromi...(a)yahoo.com> wrote: > On Apr 22, 9:31 pm, Brad Guth <bradg...(a)gmail.com> wrote: > > > > > On Apr 22, 1:33 pm, "Greg Neill" <gneil...(a)MOVEsympatico.ca> wrote: > > > > Brad Guth wrote: > > > > How about photons from a vibrant 10 solar mass star that's situated > > > > well within our visual detection horizon of 13.7e9 ly, but trekking > > > > directly towards us at -c? > > > > It can't. Nothing physical within our horizon can be > > > observed to move at or above c. Close to c, sure, but > > > not at or above. > > > > The best a body can do is approach c with respect to > > > observers in its proximity (within the local region of > > > space moving with the Hubble flow). Every non-local > > > observer (such as us sitting a great distance away from > > > that region in our own local region) sees that region > > > of space moving away in bulk according to the Hubble > > > expansion, thus decreasing any net speed of approach. > > > I wasn't asking for your subjective opinion of physics. > > > I was asking about photons from a vibrant 10 solar mass star that's > > situated well within our visual detection horizon of 13.7e9 ly, > > trekking directly towards us at -c. How would we ho about detecting > > this 100% blue-shift? > > > ~ BG- Hide quoted text - > > > - Show quoted text - > > What if you are moving sideways to light when absorbing it? What shift > is it going to have? > > There must be a maximum energy shift with drop off at different angles > of absorption. > > Mitch Raemsch Interesting interpretation or notion, of perhaps a phase shift taking place. Sideways or angular encounters of photons is perhaps just interacting with considerably more photons. Each and every nm3 of our universe has it's own streams of photons. ~ BG
From: BURT on 23 Apr 2010 02:14 On Apr 22, 10:41 pm, Brad Guth <bradg...(a)gmail.com> wrote: > On Apr 22, 10:27 pm, BURT <macromi...(a)yahoo.com> wrote: > > > > > > > On Apr 22, 9:31 pm, Brad Guth <bradg...(a)gmail.com> wrote: > > > > On Apr 22, 1:33 pm, "Greg Neill" <gneil...(a)MOVEsympatico.ca> wrote: > > > > > Brad Guth wrote: > > > > > How about photons from a vibrant 10 solar mass star that's situated > > > > > well within our visual detection horizon of 13.7e9 ly, but trekking > > > > > directly towards us at -c? > > > > > It can't. Nothing physical within our horizon can be > > > > observed to move at or above c. Close to c, sure, but > > > > not at or above. > > > > > The best a body can do is approach c with respect to > > > > observers in its proximity (within the local region of > > > > space moving with the Hubble flow). Every non-local > > > > observer (such as us sitting a great distance away from > > > > that region in our own local region) sees that region > > > > of space moving away in bulk according to the Hubble > > > > expansion, thus decreasing any net speed of approach. > > > > I wasn't asking for your subjective opinion of physics. > > > > I was asking about photons from a vibrant 10 solar mass star that's > > > situated well within our visual detection horizon of 13.7e9 ly, > > > trekking directly towards us at -c. How would we ho about detecting > > > this 100% blue-shift? > > > > ~ BG- Hide quoted text - > > > > - Show quoted text - > > > What if you are moving sideways to light when absorbing it? What shift > > is it going to have? > > > There must be a maximum energy shift with drop off at different angles > > of absorption. > > > Mitch Raemsch > > Interesting interpretation or notion, of perhaps a phase shift taking > place. > > Sideways or angular encounters of photons is perhaps just interacting > with considerably more photons. Each and every nm3 of our universe > has it's own streams of photons. > > ~ BG- Hide quoted text - > > - Show quoted text - If there are angles of absorption straight front and back there would be maximum red and blue shift. But sideways or 90 degrees should yield no shift. And then there all the different angles and energies of red and blue inbetween. Mitch Raemsch
From: BURT on 23 Apr 2010 17:52 On Apr 23, 2:17 pm, Brad Guth <bradg...(a)gmail.com> wrote: > On Apr 23, 10:36 am, Double-A <double...(a)hush.com> wrote: > > > > > > > On Apr 22, 9:31 pm, Brad Guth <bradg...(a)gmail.com> wrote: > > > > On Apr 22, 1:33 pm, "Greg Neill" <gneil...(a)MOVEsympatico.ca> wrote: > > > > > Brad Guth wrote: > > > > > How about photons from a vibrant 10 solar mass star that's situated > > > > > well within our visual detection horizon of 13.7e9 ly, but trekking > > > > > directly towards us at -c? > > > > > It can't. Nothing physical within our horizon can be > > > > observed to move at or above c. Close to c, sure, but > > > > not at or above. > > > > > The best a body can do is approach c with respect to > > > > observers in its proximity (within the local region of > > > > space moving with the Hubble flow). Every non-local > > > > observer (such as us sitting a great distance away from > > > > that region in our own local region) sees that region > > > > of space moving away in bulk according to the Hubble > > > > expansion, thus decreasing any net speed of approach. > > > > I wasn't asking for your subjective opinion of physics. > > > > I was asking about photons from a vibrant 10 solar mass star that's > > > situated well within our visual detection horizon of 13.7e9 ly, > > > trekking directly towards us at -c. How would we ho about detecting > > > this 100% blue-shift? > > > > ~ BG > > > Any star moving towards us at the speed of light would be a black hole > > relative to us (infinite mass). Also every photon it emitted in our > > direction would also be a black hole, because 100 percent blue-shift > > would cause the infinite energy resulting from that shift to be > > confined to an infinitely small area, thus resulting in event horizons > > forming. Unless there proves to be some truth to long range variable > > speed light theories, there would be no way we could detect it before > > it hit us! > > > Double-A > > I'll buy that, except there should be a fairly large radii Oort cloud > that could be detectable as we pass through or nearby. Our small and > relatively passive sun supposedly has a light year radii worth of Oort > cloud. > > ~ BG- Hide quoted text - > > - Show quoted text - What is the left over of the prior supernova? What if it left behind a neutron star or core in the Oort cloud? We could test gravity. Mitch Raemsch
From: spudnik on 23 Apr 2010 18:48
you (all) are presuming a corpuscular "light;" das ist verboten, saith Schroedinger's joke-cat. > If from ahead or behind there is an energy shift what about sideways > absorption of light? thus: the whole basis, sometime since Ahrrenius coined "greenhouse gasses," has been predicated on a simple lack of a model of an ordinary glass house, say, at a certain lattitude out of the tropics. not only is "global" warming an oxymoron, nonsequiter, or just a misnomer, by a very simple trig "model" of insolation at any lattitude, but there are *no* datasets that show such a phenomenon (extrapolating from the handful that I ahve looked at, more or less casually, over the decades). and, yet, the climate is changing very rapidly "in the Anthropocene," in line with the #1 anomaly, that night & winter are "warming, faster," than at day & summer. > Climate scientists at East Anglia University cleared by inquiry > http://www.timesonline.co.uk/tol/news/environment/article7097234.ece thus: if you don't know any spherical trig, a la color plate one in _S_, you might as well forget "it" (*mathematica* .-) http://www.rwgrayprojects.com/synergetics/synergetics.html thus: with ships & materiel) -- what the Revolution was about -- not just, Taxation without representation, a la the Tea Party effetes and the Encyclopedia Brittaninca! as they say, the bears make money, the bulls make money, and the hogs always get slaughtered. none of the (two) experts, I have read or asked, thought that a Carbon Tax wouldn't work as well, just that it was somehow politically impossible. thus: if some one gave a *reason* to redefine "twin primes," that'd be "mathematical" (proviso: er, maths; math is four subjects, at minimum). as for the idea of calling AP, an ultrafinitist, I only have two things to say: a) it wouldn't make any difference to him, being a user of "E-prime," the joke-language of Korbizynski (sp.?); b) the Monster group's symmetry has a factoring that is awfully similar to Bucky's here-to-fore silly finite base for computation: http://www.rwgrayprojects.com/synergetics/s12/p3100.html#1238.20 --Light: A History! http://wlym.com |