Trying to wrap my pea sized brain around the universe.

In summary: Surely if you are going to be reading something you should at least be somewhat familiar with its origins and author?
  • #1
Frozenoak
6
0
I have been reading an aged book about superluminal transmition of information. I am only a couple chapers into the book, the part where the author is introducing the uninitiated (that would be me) to the concepts of reletivity. On thing he keeps coming back to is that time, length and mass are all relitive to the observer. The statement I am wondering about is this.

If a man is standing on the bridge of some space faring ship he is standing still relative to himself, therefor he can never reach the speed of light no matter how fast the ship appears to be moving to someone on the outside.

I can give referance to the book at a latter time but I don't have it with me atm.

Regards,
dale
 
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  • #2
You didn't ask a question...
 
  • #3
From my understanding, nothing can surpass the speed of light do to the symmetry of the universe and how its asymptocal?. Someone correct me if I am wrong.
 
  • #4
If a man is standing on the bridge of some space faring ship he is standing still relative to himself, therefore he can never reach the speed of light no matter how fast the ship appears to be moving to someone on the outside.
I think maybe you've misquoted the book. Everything is always stationary 'relative to itself', so it hardly seems worth mentioning.
The point about relativity is that all motion is relative, so the idea of motion only makes sense if we specify who is measuring which velocity. It is also true that nothing can accelerate so that it reaches the speed of light, in anyone's frame of reference.
 
  • #5
I have some off topic questions if Dale will indulge me...

Frozenoak said:
I have been reading an aged book about superluminal transmition of information.

Dale, I often see posters do this and it always baffles me, so if you don't mind I'll share my bafflement: why oh why would anyone ask about a book which is puzzling them without saying which book is giving them trouble? I would think it would be obvious that this is highly relevant information which would greatly assist us in helping you!

Warning: "superluminal transmission of information" is forbidden in relativistic physics, and this was recognized rather early, so if the book you are reading contradicts this assertion, I must suspect that it does not belong to the canon of mainstream physics. In that case, I hope you will see the wisdom of first studying str using a mainstream textbook such as Taylor and Wheeler. After you know what str says (as explained in a modern and reliable source), you will be in a better position to critique outdated or fringe books.

Frozenoak said:
I can give referance to the book at a latter time but I don't have it with me atm.

Sigh... OK, well I guess you answered my question above, but now I have a new question. I often see readers who say they are reading some book but who say or imply that they have no idea who the author is, what the title is, or where and when it was published, or even in what language it was originally published. So what's going on with that?
 

1. What is the universe?

The universe is the entirety of all matter, energy, time, and space, including all planets, stars, galaxies, and other cosmic objects.

2. How big is the universe?

The size of the universe is currently unknown, as it is constantly expanding. However, it is estimated to be around 93 billion light-years in diameter.

3. How old is the universe?

The universe is approximately 13.8 billion years old, based on our current understanding of the Big Bang theory.

4. What is dark matter and dark energy?

Dark matter is a type of matter that does not emit or absorb light, and makes up about 27% of the universe. Dark energy is a mysterious force that is believed to be responsible for the accelerating expansion of the universe.

5. Is there life on other planets?

We do not have definitive proof of life on other planets, but it is highly likely that there is some form of life outside of Earth, given the vastness of the universe and the potential for habitable environments on other planets.

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