# Linked Questions

17 questions linked to/from Extended Rigid Bodies in Special Relativity
1answer
189 views

### Can we travel faster than the speed of light? [duplicate]

So my question is completely a theoritical question. For example i have a stick made of the strongest material and lightest material and its lenght is as long as the solar system's diameter. The end ...
1answer
99 views

### If I have a huge analog clock, what happens to the seconds hand if I build it longer than 2.864.788 kms? [duplicate]

Suppose I'm able to build a huge analog clock, with a seconds hand very long. I want have hand end running at light speed (300,000 km/s). Needle then has to be 300,000km*60s/(2pi) = about 2,864,788km (...
0answers
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### what are the relativistic/cosmological implications on a long rigid body? [duplicate]

This is my first question. Hope it's in respect of quality standards. Let's suppose to have a "long" rigid almost unbreakable bar of fixed negligible diameter . (we can imagine it as a rigid wire) ...
0answers
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### do information travels faster than light? [duplicate]

Suppose a long rod of length 6 lakh kms is subjected to movement at one end,does it move immediately or not at another end?
16answers
13k views

### Is it possible for information to be transmitted faster than light by using a rigid pole?

Is it possible for information (like 1 and 0s) to be transmitted faster than light? For instance, take a rigid pole of several AU in length. Now say you have a person on each end, and one of them ...
12answers
8k views

### Why isn't length contraction permanent even though time dilation is?

It's my understanding that when something is going near the speed of light in reference to an observer, time dilation occurs and time goes slower for that fast-moving object. However, when that ...
2answers
239 views

### Length Contraction in Relativity [closed]

Let's suppose we have a one dimensional rod made of elementary point particles, in contact with each other placed along the x-axis.If the rod is moving along x-axis then we know (because of relativity)...
4answers
135 views

### How do we determine who is the “observer” when calculating time dilation? [duplicate]

I was reading about time dilation and I thought of a question. I really think that I am just misunderstanding something, so please bare with the question. But, I would appreciate if somebody could ...
1answer
429 views

### What is the theoretical upper limit on the rigidity of a material?

Take a perfectly rigid metal rod of length $2\ell$ and some uniform linear density. Place one end (‘south’) at $(0,-\ell)$ and the other (‘north’) at $(0, \ell)$. Over some reasonably short time ...
1answer
308 views

### Is it possible to have uniform proper acceleration along a large object without breaking it?

I'm learning about accelerating reference frames (to eventually get grasp of general relativity too). I've just read about the Rindler coordinates and this one caught my eye Note that Rindler ...
2answers
166 views

### A rope tied to another galaxy

Suppose there is a strong stiff rope tied to a distant galaxy. The rope is so long that it passes by us here on Earth. If the galaxy is so far away that it moves away from us faster than the speed of ...
1answer
157 views

### Thought experiment on space curvature due to gravity

Let's say you built a huge, straight rigid beam out in space, far from the sun (outside the orbit of Pluto). It is very long, say 200,000 miles long, but can be very narrow. Then you move it to the ...
1answer
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### Questions about universe expansion

I have some questions about the expansion of the universe: The expansion rate is almost 70 km/s for 1 Mpc, so lets say we have a rigid cylinder having a length of one Mpc. As far as I understand, ...
1answer
74 views

### Reference systems in Special and General Relativity

I am enthralled by the notion of placing observers along with standard identical clocks in a line spaced from one another according to rods of standard length when place next to one another at the ...
0answers
59 views

### Calculate the acceleration of the trailing muon bunch

Two separate suitably short but intense bunches of muons, "A" and "B", are both supposed to be constantly accelerating (in an otherwise sufficiently flat region) with constant proper acceleration ...

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