pervect's latest activity
-
Ppervect replied to the thread High School Am I understanding the concept of proper frame of reference?.It looks more like you are trying to understand the relationship between two inertial frames of reference rather than the concept of a...
-
Ppervect replied to the thread Undergrad Question about Parallel Transport.I'm not doubting your word on this, but a reference would be handy.I thought "extremal" and "stationary" were synonyms. For an I level...
-
Ppervect replied to the thread Undergrad Question about Parallel Transport.It's always safer (though less understandable) to say that geodesics (of the Levi-Civita connection) are extremal rather than maximums...
-
Ppervect replied to the thread Undergrad Question about Parallel Transport.For a general way to get an intuitive feelings for geodesics that is not too advanced, I'll put in a plug for the "sector model"...
-
Ppervect replied to the thread Undergrad Question about Parallel Transport.A limited notion of parallel transport that works on a sphere is, IMO, a good place to start. One start with the notion that great...
-
Ppervect replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.Thanks - I can see why if the majority of the effect is due to "the missing inch" aka "space curvature", one might neglect Thomas...
-
Ppervect reacted to A.T.'s post in the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit? with
Like.
When you scroll down on this page: https://archive.org/details/L.EpsteinRelativityVisualizedelemTxt1994Insight/mode/2up You will find... -
PI can’t seem to let this go, partly because some have asked for how to make the embedding result (part of Euclidean plane in 3-sphere)...
-
Ppervect replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.Section 7 of the reference I quoted explains this in more detail: So yes I agree that Thomas precession is just one component of the...
-
Ppervect replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.I agree with your no answer to the OP's question, but you haven't mentioned Thomas precession at all. The best reference I have at the...
-
Ppervect replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.As far as I know, this is just due to the ISS being deliberately locked to a constant orientation relative to the Earth, for practical...
-
Ppervect replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.Yes, I was in a bit of a rush - though I probably couldn't be that precise anymore anyways. (Was I ever? Probably not, not that it...
-
Ppervect replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.It would be bent twice as much by a mass. But I don't think not on an elevator. I don't have a reference for this statement, but I...
-
Ppervect replied to the thread Undergrad Can a Gyroscope in a Satellite Detect Orbit?.There's a couple of different questions here. Basically, using devices that spin (such as the Forward Mass detector), can detect...
-
Ppervect replied to the thread Undergrad Euclidean geometry and gravity.Thank you. Untangling this in terms I can more fully understand will be quite a problem. I'm suspecting the issue is fundamental in...