All Questions
26
questions
1
vote
1
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117
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How would a spacecraft travelling near light speed say 0.9c compensate for time dilation in radio communication from spacecraft to earth?
For a spacecraft travelling at 0.9 c for 5 seconds, only 5 seconds would have passed for an observer on Aircraft, while 26.31 second would pass for a stationary observer watching from Earth.
In a ...
1
vote
4
answers
165
views
Is constant acceleration the same relative to other objects at all velocities?
If you are accelerating at a constant rate of 10 $m/s^2$, will you see things around you move at 10 $m/s$ faster every second, even when approaching the speed of light?
a) If not: How do you calculate ...
- 171
0
votes
6
answers
173
views
If time runs slow for moving train, how can it cover same distance in less time than someone on the ground unless the track decreases in its view?
According to special relativity,
Δt=γ*Δt' ... (1)
Where,
Δt is the time the train takes to completely pass by me according to my watch,
Δt' is the time I should see has passed for someone on the train....
-3
votes
1
answer
99
views
Would time dilation increase the distance between objects? [closed]
Two objects are moving towards a gravity well. They are at $x$ distance from each other and moving at a fixed speed. The gravity well is massive enough for the objects to experience significant time ...
- 141
-3
votes
3
answers
213
views
Does proper time have two different values or meanings? [closed]
I'm trying to intuitively understand proper time which is defined as the time that is always measured in a moving observer’s or particle's rest frame and is given by the equation
$\Delta\tau = \sqrt{1 ...
- 335
1
vote
3
answers
129
views
Exact meaning of Lorentz transformations [closed]
This is my first year in Physics and we have been shown about S.R very superficially, just having a bunch of equations to apply. However, I feel rather confused about results such as time dilation, ...
0
votes
3
answers
499
views
Where in the universe does time pass fastest relative to time on earth?
It is my understanding that time essentially moves slower in higher gravitational fields relative to time on earth. Conversely, in lower gravitational fields, time passes faster relative to earth. Is ...
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 ...
1
vote
0
answers
37
views
Does the clock tick faster when falling? [duplicate]
I just read this answer that explains that the time dilation due to the gravity and the time dilation due to velocity are the same thing.
Does that mean that, if I fall from the top of a skyscraper on ...
- 143
17
votes
4
answers
13k
views
Why does everyone say that the faster you move through space, the slower you move through time, when that's not the case?
Suppose, I'm on earth and my brother is moving away from earth at a constant speed, $v=0.8c$. Now, if 5 seconds $(t_0)$ pass for me, the amount of time that will pass for my brother according to me ...
- 1,018
1
vote
0
answers
89
views
Does time expand?
If the time component of spacetime does not "expand" in the sense that space expands, doesn't that imply that time must already exist in its entirety, past and future? I believe I have seen ...
- 11
0
votes
2
answers
290
views
Understanding proper-time as "evenly spaced gradations" on the worldline?
In this video series on relativity, proper-time is explained as "evenly spaced gradations" along a particle's worldline. Here is a screenshot:
Suppose I carry a clock with me that ticks at ...
- 164
0
votes
2
answers
175
views
Is time dilation derivable from (non-)simultaneity?
My friend, Nima Fathali, used to claim that the fact time dilation can be deduced from the (non-)simultaneity though I used to claim otherwise saying that these two qualities are independent of each ...
- 2,503
-3
votes
4
answers
126
views
Symmetry in time dilation in special relativity [duplicate]
This question is related to this Time between two observer in special relativity
Suppose we have to observers, $A$ and $B$ so that when they are a distance $d=c\tau$ from each other measured by ...
- 445
10
votes
8
answers
3k
views
Do physicists understand why time slows down the faster the velocity of an object? [duplicate]
Like do they understand the mechanism behind it? Is there a mechanism behind it? (for a lack of a better word) Or is it just thought to be a law without any further explanation?
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