- #1

- 78

- 0

Is this true?

On the other hand I have heard that the universe would seem to converge in front of me.

Can these both be true?

- Thread starter duordi
- Start date

- #1

- 78

- 0

Is this true?

On the other hand I have heard that the universe would seem to converge in front of me.

Can these both be true?

- #2

- 372

- 0

Well,it really depends on your direction of relative velocity.Say ur going past an object with relative velocity only in the x direction.Then you would see that if the proper length of the object is [tex]L_0[/tex] and ur relative velocity is [tex]\vec v[/tex] then

the length [tex]L[/tex] perceived by you will be

[tex]L_0_x=\frac{L_x}{\sqrt{1-{v^2/c^2}}}[/tex]

the length [tex]L[/tex] perceived by you will be

[tex]L_0_x=\frac{L_x}{\sqrt{1-{v^2/c^2}}}[/tex]

Last edited:

- #3

- 78

- 0

When B and C have no velocity with respect to each other would they appear to get closer together?

Would the distance between them seem to shorten to me because of my velocity?

It seems you are saying yes.

- #4

- 9,954

- 1,136

You have to be a bit careful to distinguish between what you see with your naked eyes, and what you measure (after taking into account propagation delays).

Both of your statements are true under diffrerent interpretations of your question. See for instance http://www.exo.net/~pauld/stars/PD_images_relativ.html for the visual appearance of "convergence to a point". (It is apparently taken from http://adsabs.harvard.edu/abs/1979AmJPh..47..309M

You might also want to read about "Terrell rotation" as far as visual appearances go, for instance in the sci.physics.faq "Can you see the Lorentz contraction"

http://math.ucr.edu/home/baez/physics/Relativity/SR/penrose.html

Both of your statements are true under diffrerent interpretations of your question. See for instance http://www.exo.net/~pauld/stars/PD_images_relativ.html for the visual appearance of "convergence to a point". (It is apparently taken from http://adsabs.harvard.edu/abs/1979AmJPh..47..309M

You might also want to read about "Terrell rotation" as far as visual appearances go, for instance in the sci.physics.faq "Can you see the Lorentz contraction"

http://math.ucr.edu/home/baez/physics/Relativity/SR/penrose.html

Last edited by a moderator:

- #5

- 372

- 0

- #6

- 364

- 0

I don't know of site URL any more but I remember it was damn cool to watch.

- #7

- 9,954

- 1,136

There also are some downloads at http://www.invisiblemoose.org/site_material/Seeing_Relativity/relativity.html

of (I think) the same material.