FactChecker's latest activity
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FactChecker replied to the thread Undergrad Relational event horizons?.IMO, there are some good books that attempt to motivate the concepts of SR and GR with minimal mathematics. They are "Relativity... -
Whoever then has the effrontery to study physics while neglecting mathematics should know from the start that he will never make his...
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FactChecker reacted to Sagittarius A-Star's post in the thread Undergrad Derive the Lorentz transformation in Minkowski four-dimensional spacetime spacetime with
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The ##x'## axis rotates counter-clockwise (hyperbolic rotation of the coordinate system), see https://www.geogebra.org/m/NnrRvA46 Also... -
FactChecker replied to the thread Undergrad Relational event horizons?.I have another point to make: Modern physics is very much guided by the mathematics, often in direct opposition to the "intuition" of...
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It's rubbish, in short. That's why it doesn't make sense. This is analogous to saying that a hill is steep because the contour lines on...
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FactChecker reacted to pervect's post in the thread High School Am I understanding the concept of proper frame of reference? with Like.
I concur with Pallen's observations. MTW goes into the explicit geometric details of how to construct a proper frame of reference. And...
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FactChecker reacted to PAllen's post in the thread High School Am I understanding the concept of proper frame of reference? with Like.
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...
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FactChecker reacted to PAllen's post in the thread High School Am I understanding the concept of proper frame of reference? with Like.
Well, MTW calls it the proper reference frame of an accelerated observer, implying that a standard inertial frame is the proper...
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FactChecker replied to the thread High School Am I understanding the concept of proper frame of reference?.Ok. That could allow the case that a non-accelerated observer is also at rest and can still be called a proper reference frame. So it is...
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FactChecker replied to the thread High School Am I understanding the concept of proper frame of reference?.If you are saying that, as far as you know, the term "proper reference frame" has always been used for a frame that is always...
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FactChecker replied to the thread High School Am I understanding the concept of proper frame of reference?.Regardless of the wording of the definition given in the Wikipedia article, I believe that the term "proper reference frame" has been...
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FactChecker reacted to Ibix's post in the thread High School Am I understanding the concept of proper frame of reference? with
Informative.
I would have thought so, but the wiki article specifies it as only for an accelerated observer. I suspect they're meaning "an observer... -
FactChecker replied to the thread High School Am I understanding the concept of proper frame of reference?.Is it not true that once an observer is specified, he is the center of a proper reference frame that follows him? And isn't that true...
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FactChecker replied to the thread High School Am I understanding the concept of proper frame of reference?.As the article you reference says: a proper reference frame for an observer (accelerated or not) is "a reference frame in which an...
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FactChecker reacted to PeterDonis's post in the thread High School Am I understanding the concept of proper frame of reference? with Like.
Ok. As you yourself note in the TL/DR to this thread, this article defines a proper reference frame as a particular kind of accelerated...