All Questions
21
questions
8
votes
5
answers
1k
views
Do you always experience the gravitational influence of other mass as you see them in your frame?
You see a galaxy far away. That galaxy is attracting you with a certain amount of gravity. I'm wondering if the gravity influence of the galaxy on you, as measured by you, always ends up being what ...
- 171
0
votes
4
answers
140
views
Simultaneity of events
Apologies, this thought has been bugging me and I am... Simple
Consider two observers.
One on Earth (stationery) One travelling away from Earth at some
appreciable % of c
If the spaceship sent a ...
- 3
0
votes
1
answer
74
views
Minkowski Diagrams and Synchronized Clocks [duplicate]
While using Minkowski diagrams for studying spacetime and time dilation, I came across a problem that seems like a paradox to me, but may actually just be from a lvl of understanding.
Imagining two ...
5
votes
4
answers
1k
views
In the twin paradox or twins paradox what do the clocks of the twin and the distant star he visits show when he's at the star?
In the twins paradox of relativity one twin stays on earth while the other travels to a star ten light years away, and then immediately flies back. Because his rocket travels at just under the speed ...
3
votes
2
answers
532
views
Using time dilation to find universal frame of reference
Before I ask this question, I just want to clarify that I am by no means an expert and that this question most likely came about due to my ignorance on the subject. If this is the case, please let me ...
- 567
2
votes
6
answers
985
views
Can there be a theoretical synchronised ‘now’ moment at all points across the universe?
Einstein’s relativity rejects the notion of a universal ‘now’ moment. It underlines how the concept of ‘now’ is compromised due to time passing at differing rates in differing frames of reference, ...
- 719
0
votes
2
answers
208
views
Hypothetical effect of Solar System/Orion Spur traveling near speed of light
I was hoping that some genius could explain what we would observe in the universe around us in the following hypothetical scenario in which the earth itself were traveling at or near the speed of ...
- 101
3
votes
4
answers
677
views
How close should you get to speed of light, in order for time to be dilated?
Recently I was watching Carl Sagan's Cosmos: A Personal Voyage. In episode 8 ("Journeys in Space and Time") there is a scene presenting the idea of time dilation, due to traveling close to the speed ...
user187075
0
votes
2
answers
323
views
If we filmed what happens on an extremely time dilated planet in realtime
Say there was a planet that experienced insane time dilation due to orbiting a black hole, say 1hr on there is 7 years on Earth (something like that), and that it was close enough to Earth for light ...
2
votes
1
answer
63
views
Can a system's orientation relative to direction of motion create additional relativistic effects?
Setup
Consider an observer, at rest, holding two perfect clocks:
The first perfect clock is ordinary--with no additional distinction.
The second perfect clock has a special constraint, as it is ...
- 161
4
votes
1
answer
794
views
Is this spacetime diagram for the twins paradox correct?
The link at question is here: http://www.einsteins-theory-of-relativity-4engineers.com/twin-paradox-graphical-solution.html
My question in specific is the loop in Jim's worldline. I know that ...
1
vote
4
answers
1k
views
How does gravity slow a clock at a distance?
If you have two identical clocks that are synchronized and then you move one significantly closer to a black hole but still far from the black hole, the closer clock will mark time slower than the ...
- 11
0
votes
1
answer
243
views
For a distant observer can a black hole form and grow in finite time? [duplicate]
Consider an observer at a significant distance away from a collapsing star.
As such when a singularity is born at the core of the star the observer would never see it grow anymore than the ...
- 838
3
votes
1
answer
113
views
Is it correct to say, "Time slows down the deeper we go in a gravitational field, because some of it is converted to spatial velocity"?
Is it correct to say, "Time slows down the deeper we go in a gravitational field, because some of it is converted to spatial velocity"?
If we imagine a space-dimension on $x$-axis and Time on $y$-...
- 61
5
votes
3
answers
7k
views
Where in Universe does time move faster than it moves on Earth?
I know that around black holes and areas with dense gravitational fields, time is supposed to move a lot slower, meaning that for example, a year in Earth might be just a second around a Black Hole.
...
