PeroK's latest activity
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PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.I missed that. I assumed he was still talking about inertial rocket motion at that point. This is the problem with spending all the... -
PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.I've just been out for a bike ride and I was wondering about that as I was cycling round!
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PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.I just watched a bit of it. I must admit, I'm not predisposed to watch a video where someone claims everyone else is wrong! It's quite...
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PeroK reacted to A.T.'s post in the thread Undergrad Is this another "paradox" or a veritasium mistake? with
Informative.
This is true for the total global deflection over a large region around a mass, where the effects of spatial curvature become... -
PeroK reacted to 256bits's post in the thread Undergrad Is this another "paradox" or a veritasium mistake? with
Like.
The video is somewhat lax in the explanation. Good catch! We can take as true for the spacecraft thought experiment in that light... -
PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.I watched the relevant part of the video. The video is correct, in what it says about light as measured in inertial and accelerating...
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PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.I didn't watch the video, but I assume it's correct. Light moves in a straight line in an IRF.
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PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.PS note that this scenario in itself is not peculiar to special relativity. In classical physics, a light beam could bend in an...
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PeroK replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.The inertial observer would see the same emission and impact points, but that impact point would have moved (relative to the point of...
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PeroK replied to the thread Undergrad Is calling fictitious forces "not real" just about terminology?.I think the onus is on you to provide evidence of PhD students who cannot explain how motion is possible given Newton's Third Law.
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PeroK reacted to hokhani's post in the thread Undergrad Angular Momentum Vector and Its Magnitude with Like.
The calculations give ##|L_z=0\rangle =\sqrt{\frac{3}{8}} (|L_x=2\rangle +|L_x=-2\rangle ) - \frac{1}{2} |L_x=0\rangle## and we expect...
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PeroK reacted to JimWhoKnew's post in the thread Undergrad Angular Momentum Vector and Its Magnitude with Like.
I calculated it (with the aid of a mathematical software) and got the same result. In terms of ##~L_y~## eigenstates, replace...
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PeroK reacted to Ibix's post in the thread Undergrad The quintessence as variable dark energy with Informative.
You can formally model the evolution of fluctuations via perturbation theory. As I understand it, the point isn't really that "voids...
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PeroK replied to the thread Undergrad Angular Momentum Vector and Its Magnitude.An interesting result! Is that your own calculation or did you find it somewhere?
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PeroK replied to the thread Undergrad The quintessence as variable dark energy.There are no voids in a homogeneous universe. If you want to study a local region of the universe, then you need to set up the...