Sagittarius A-Star's latest activity
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Sagittarius A-Star replied to the thread I Confused about time dilation -- motion vs energy.As others mentioned, that's wrong. The following explanation in a local scenario shows, that "gravitational" time-dilation happens also... -
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Sagittarius A-Star replied to the thread A 1-Way Speed of Light.Here is a similar thing, Reichenbach's ##\epsilon##...
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Sagittarius A-Star replied to the thread A 1-Way Speed of Light.As others wrote, this trick does not work. The velocity of the "reset" signal (radio or light) from O to clocks A can be split into a...
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If the OWSOL is anisotropic then increasing the distance does not help. It gives a longer time for a smaller error to accumulate. The...
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Sagittarius A-Star reacted to ohwilleke's post in the thread A Is the constancy of c a postulate or a derivable theorem? with
Like.
Good to know. I hadn't been aware of that. -
Sagittarius A-Star replied to the thread A Is the constancy of c a postulate or a derivable theorem?.That's not completely correct. Before Einstein, when the physically relevant coordinate transformation was thought to be the GT...
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Sagittarius A-Star replied to the thread A Is the constancy of c a postulate or a derivable theorem?.Yes. A disadvantage of LET is, that it's "absolute time" is not generally equal to what a clock measures.
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Sagittarius A-Star replied to the thread A Is the constancy of c a postulate or a derivable theorem?.Yes. Morin calls it "Relativity without c". Source (see chapter 11.10 on page XI-38)...
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Sagittarius A-Star replied to the thread A Is the constancy of c a postulate or a derivable theorem?.You can do this i.e. by demanding, that a velocity composition in the same direction is commutative plus a few other assumptions, as...
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Sagittarius A-Star reacted to Greg Bernhardt's post in the thread Announcement Please welcome berkeman as PF Admin with Like.
I am thrilled and honored to announce that @berkeman has accepted a role as PF Admin! @berkeman has 20 impactful years at PF under his...
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Sagittarius A-Star reacted to south's post in the thread B Relativistic contraction factor with Like.
OP immediately wanted to delete the post when he noticed the error and couldn't find the delete option.
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Sagittarius A-Star replied to the thread I Freefall and gravity.The principle of equivalence applies. The object is locally at rest with reference to an upward accelerated frame. This situation is...
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Sagittarius A-Star replied to the thread B Time dilation for two clocks at different altitudes on Earth.This is wrong. It is a common misconception. You have such "gravitational" time-dilation also between bow and stern of an accelerating...
