pervect's latest activity
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Ppervect reacted to PAllen's post in the thread High School Am I understanding the concept of proper frame of reference? with
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I found an explicit statement in this section of MTW (13.6 bottom of p. 331 in my edition) that makes clear that they have the meaning I... -
Ppervect replied to the thread High School Why is the constant speed of light so unique?.Measuring pressure is certainly possible. Even in Newtonian mechanics, pressure is only as simple as a single number when the pressure...
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Ppervect replied to the thread High School Why Do Events Freeze For Me at the Speed of Light?.You can't move at the speed of light, but it turns out you that relativity depicts what you describe. There's another way of saying...
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Ppervect replied to the thread High School Am I understanding the concept of proper frame of reference?.I barely said anything, but if you have a chance and ability to read the reference I cited, it's the best treatment of accelerated...
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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...
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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...
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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...
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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"...
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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...
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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...
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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...
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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)...
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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...
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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...
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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...