robphy's latest activity
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robphy replied to the thread Cover songs versus the original track, which ones are better?.Girl U Want (1980) https://en.wikipedia.org/wiki/Girl_U_Want https://en.wikipedia.org/wiki/Devo (1980) Devo - Girl U Want (Live on... -
robphy reacted to Filip Larsen's post in the thread Suggestion URL for the latest post in a thread? with
Love.
Perhaps the one found on the New Post list, which for this thread is... -
robphy posted the thread Suggestion URL for the latest post in a thread? in Feedback and Announcements.Is there a URL that always points to the latest post in a thread?
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robphy replied to the thread Undergrad How does reciprocal time dilation work?.Why would you be banned?
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robphy replied to the thread Unintended color commands.I remember selecting black after having chosen red, trying to get out of red. Similarly for blue. UPDATE: I see now that I should...
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Another example (Not sure if unintentional): Here what it looks like in darkmode:
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robphy reacted to Dale's post in the thread Undergrad How does reciprocal time dilation work? with
Like.
This is an incomplete sentence. You have named two events, so you have the subject of the sentence, but not the verb. Please use... -
robphy replied to the thread Undergrad How does reciprocal time dilation work?.Here's my graphical attempt to help you @Mike_bb . After a summary-and-diagram, there is a second diagram with an exercise for you to...
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robphy replied to the thread Undergrad How does reciprocal time dilation work?.I think you need to write out... I'm going to use "reads" to avoid possible misinterpretations when using anything suggesting what it...
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robphy reacted to Dale's post in the thread Undergrad How does reciprocal time dilation work? with Like.
Have you completed the figure I described above? Please post it...
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robphy replied to the thread High School Uncertain about part of the Order of Operations, from a formula.If these quantities are associated with units, inserting the units could help clarify the order of operations.
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robphy reacted to Matterwave's post in the thread Undergrad How does reciprocal time dilation work? with Like.
If I had an "a-ha" moment for special relativity, it was after learning General Relativity. Specifically chapter 8 in Wald on causal...
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robphy reacted to Dale's post in the thread Undergrad How does reciprocal time dilation work? with Like.
I would say the radar coordinates are the realistic ones for that reason and the standard coordinates are the idealized ones for that...
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robphy replied to the thread Undergrad How does reciprocal time dilation work?.Once I have defined a light-clock diamond (in my local region), and make reasonable assumptions of homogeneity and isotropy, I can...
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robphy replied to the thread Undergrad How does reciprocal time dilation work?.Here are operational definitions using a radar method (which was my "a-ha moment"[1][2] in relativity). To assign coordinates to a...
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