![]() Unlock and upgrade over 10 crazy cars, including a sleek police car, a Not Doppler bus, a tank, and a monster truck hearse (don't ask.) Each new tier you unlock will give you access to new levels: from the peaceful Docks, to the trap-filled caves of the Ice Caverns, to the fiery Devil's Island and to more new worlds coming soon! ![]() Gravity-bending worlds, crazy unlockable cars, awesome power-ups and a whole lot of action awaits.Ĭompete in 1v5 multiplayer races and climb your way up the arena tiers. ![]() Perform epic stunts to gain turbo and race your way to victory! Renegade Racing is an adrenaline-filled, wacky multiplayer racing game. This is the Milne model (already linked above).The hit online game with over 190 MILLION PLAYS has made its way to mobile, bigger and crazier than ever before - and now with multiplayer! Just let all the galaxies start at a point in Minkowski space and move inertially after that with velocities that are evenly distributed in (four-)velocity space. This isn't correct it's easy to construct a toy cosmology where Hubble's law applies equally everywhere and the redshift is manifestly a Doppler shift, correctly given by the special relativistic formula. " For a doppler interpretation of the redshift distant galaxies we must necessarily assume that we are in a special place, to the discomfort of Copernicus. The vectors are parallel transported along the light's path to a common location before the dot product is taken.$\mathbf x$ is a four-vector tangent to the light's path at some point (such as the light's four-momentum, or any nonzero multiple of it).$\mathbf v_e$ and $\mathbf v_r$ are the four-velocities of the emitter and receiver at the time of emission and reception respectively.My third answer: "For galaxies at $z>1$ you can only have $v ![]() the cosmic microwave background), and the GR predictions about redshift agree with observations. Expansion, redshift and the Hubble law are explained coherently in GR, as well as many other phenomena (e.g. As a consequence, distant galaxies recede from us and the wavelength of the light is "streched". I understand that this redshift is well explained in general relativity (GR) by assuming that space itself is expanding. How can I explain to my 17 year old pupils that the observed redshift of distant galaxies cannot be interpreted as a doppler effect and inescapably leads to the conclusion that space itself is expanding?
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |