I Hyper-Light Speed: What Happens?

  • I
  • Thread starter Thread starter 5P@N
  • Start date Start date
  • Tags Tags
    Speed
5P@N
Messages
58
Reaction score
3
Let's say you were to launch a star at a speed that is twice the speed of light.
 
Physics news on Phys.org
Isn't that impossible?
 
Hell yes, but let's try to imagine what would happen anyways. Would the star tear a rift in timespace? Would there be an EM shockwave? Gravitational waves? Relativistic effects? Would the atoms in the star break apart into subatomic particles? What do you think would happen?
 
It turns into a herd of invisible pink unicorns.
 
  • Like
Likes PWiz and bcrowell
5P@N said:
Hell yes, but let's try to imagine what would happen anyways. Would the star tear a rift in timespace? Would there be an EM shockwave? Gravitational waves? Relativistic effects? Would the atoms in the star break apart into subatomic particles? What do you think would happen?
The question you are asking is exactly this "Assume the laws of physics don't apply and then figure out what the laws of physics say about <insert nonsense of your choice>"

This forum is not for that kind of question. It's for actual science.
 
  • Like
Likes PWiz, m4r35n357 and mfb
OK, so this has bugged me for a while about the equivalence principle and the black hole information paradox. If black holes "evaporate" via Hawking radiation, then they cannot exist forever. So, from my external perspective, watching the person fall in, they slow down, freeze, and redshift to "nothing," but never cross the event horizon. Does the equivalence principle say my perspective is valid? If it does, is it possible that that person really never crossed the event horizon? The...
From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...
ASSUMPTIONS 1. Two identical clocks A and B in the same inertial frame are stationary relative to each other a fixed distance L apart. Time passes at the same rate for both. 2. Both clocks are able to send/receive light signals and to write/read the send/receive times into signals. 3. The speed of light is anisotropic. METHOD 1. At time t[A1] and time t[B1], clock A sends a light signal to clock B. The clock B time is unknown to A. 2. Clock B receives the signal from A at time t[B2] and...

Similar threads

Replies
25
Views
2K
Replies
93
Views
5K
Replies
11
Views
2K
Replies
72
Views
3K
Replies
42
Views
759
Back
Top