All Questions
Tagged with special-relativity observers
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What does hypersurface of simultaneity exactly mean?
HSS - "Hyper Surface of Simultaneity"
Listening to different sources online I understood that HSS for a observer represents the points that are at same moment of time.
Consider a 1d world. ...
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Relativity of simultaneity in flat spacetime
In Einstein’s (1917) thought experiment on the relativity of simultaneity…
The lightening flashes at A and B are both equal distance from the center of the train and the center of the platform.
The ...
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Understanding time dilation in layman's terms
I would love to have a better understanding of Einstein's theory of relativity and how time dilation in particular works with a simple example.
Let's say I have twins. One takes a trip to a far away ...
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Does frame dependency of events result in entirely different worlds?
Suppose there are two seeds kept at equal distance from a light source which emits a photon each on either directions. Seed germinates when a photon falls on it. According to rest frame both the seeds ...
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Lorentz Transformation or Time Dilation? [closed]
Say there is a spaceship really far away from Earth moving at 80% the speed of light (away from Earth-edited), at some point a radio signal is sent by observers on Earth. I need to be able to ...
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Is this the right way to think about accelerated observers?
$c=1$
I'm trying to think of a way to understand the change of coordinates from an observer at rest to an accelerated one. Clearly, a single Lorentz transformation with $v=v(t)$ is not the right way ...
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Special relativity - what is the age of my twin after a one-way trip? [duplicate]
I have a twin who stays on Earth, and I will move to another planet 4 ly away. I will travel at a certain relativistic speed towards this planet.
What I just described here is the first half of the ...
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Would an object moving close to the speed of light appear colder to a stationary observer? [duplicate]
If an object moves close to the speed of light time will slow down in its reference frame as seen by a stationary observer. If my understanding is correct, this means that all movement - such as the ...
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"Rear clock ahead" effect in special relativity
I've read (pretty much) all the questions in the site regarding the topic, however I wasn't able to comprehend the author's solution to the problem in its totality. The problem is from David Morin's ...
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Is it possible to detect your speed relative to light? [duplicate]
Let’s take two cases: (1) your velocity is constant and (2) you are accelerating.
(1) isn’t the answer no, like that’s a core idea of Einstein’s relativity stuff?
(2) I don’t know.
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Does this special relativity question have enough information to solve it?
I recently encountered this question:
How long would an someone need to spend on the ISS so that
their biological clock would be one day younger than their twin who stayed on Earth? The ISS is ...
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Relationship between clock rate and speed
Let's consider example:
The propagation of light from the middle of a moving train to its left and right ends. From the point of view of a train passenger, the light will reach the right and left ends ...
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Relativity of Simultaneity - Why doesn't the train/lightning example contradict the absolute speed of light?
I know similar questions have been asked here before, but none of them seem quite to address my particular confusion.
I'm not afraid of math (I did well in calc III last semester, for example) but my ...
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Does a train that moves at relativistic speed and then decelerates to zero speed, seem to expand to an observer at rest near the tracks? [duplicate]
A train is moving with a relativistic speed, according to an observer at rest near the tracks. To this observer, the train seems contracted in the direction of motion.
Then, the train decelerates (...
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Details on analyzing relative motion
I have been viewing some videos and reading some articles about Relativity and relative motion. My search abilities seem to be rather lacking. I am looking for articles, questions, and/or forums ...
