Linked Questions

0
votes
1answer
55 views

How would you visualise a curvature in spacetime? [duplicate]

Just wondering how one could visualise a curvature in spacetime. If anyone has a site, image or video showing this it would be appreciated.
57
votes
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 ...
29
votes
6answers
5k views

Does the curvature of spacetime theory assume gravity?

Whenever I read about the curvature of spacetime as an explanation for gravity, I see pictures of a sheet (spacetime) with various masses indenting the sheet to form "gravity wells." Objects which are ...
10
votes
4answers
3k views

Misused physics analogies [closed]

Have you noticed that many questions and misconceptions in physics arise due to misuse of analogies, which were invented to "explain in simple words" some physical phenomena? For example there is a "...
7
votes
4answers
2k views

What does spacetime look like near a black hole?

I saw three different depictions: Never ending 'hole': Point: Paraboloid: Also, do black holes rip space-time, if not, is there any other way to? P.S. I'm not sure if the last one is a point as ...
9
votes
3answers
2k views

Visualizing GR spacetime distortion in 1+1D spacetime instead of 2D space

Usually spacetime distortion due to mass in GR is visualized as a rubber sheet distorted under some massive object, like this: source or as shown in this link. But what has always bothered me is ...
6
votes
2answers
270 views

Ricci scalar and General Relativity cartoon pictures

In many cartoon pictures trying to explain general relativity, there is usually a massive object embedded in a "spacetime mattress" and heavier the object, deeper it sinks. However, what is actually ...
-3
votes
1answer
375 views

If the space-time curve was quantified and has a mathematical function what would the derivative of the function mean? [closed]

Say I have a massive object: This object as we know causes spacetime to bend and curve. The "maximum curve" which I would define as the line in space time that runs directly through the center of ...
3
votes
1answer
441 views

Physical visualisation of curvature

I was wondering-how do you visualise curvature in the context of general relativity. The gravity well and trampoline analogies are quite wrong, so I want a more realistic approach to it (say, the way ...
2
votes
0answers
548 views

General relativity in 2D curved paraboloid space time

I am wondering if there are basic examples of general relativity in 2D (1+1) space time to help visualising the concept of curved space time? I have read things like "in 1+1 and 2+1 dimensions the ...
2
votes
2answers
245 views

Gravity spacetime visualization [duplicate]

When gravity spacetime is visualized, it's a sag with the lowest point in the middle of the planet/star as you can see here: For all planets and stars, there is zero G in the core due to that the ...