Dale's latest activity
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Lemaitre coordinates are a nice set of coordinates for describing observers free-falling (aka rain observers) in a Schwarzschild... -
Dale reacted to Nugatory's post in the thread B What reference frame is used for the velocity v in the Lorentz transformation? with
Like.
You might want to start by working through the Twin Paradox FAQ... -
Dale reacted to Ibix's post in the thread B What reference frame is used for the velocity v in the Lorentz transformation? with Like.
I can do this easily (except for the bits you haven't specified l, discussed below). The point is for you to familiarise yourself with...
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Dale replied to the thread B What reference frame is used for the velocity v in the Lorentz transformation?.Yes. ##2020-2015## is ##5## years and ##2025-2015## is ##10## years. So the mathematical question is, do there exist two timelike...
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Dale reacted to weirdoguy's post in the thread B What reference frame is used for the velocity v in the Lorentz transformation? with Like.
There are no authoritative theories in physics. We do not "belive" in any theory because someone said we should. We "belive" in them...
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Dale reacted to Ibix's post in the thread B What reference frame is used for the velocity v in the Lorentz transformation? with Like.
Of course. But you aren't doing anything except repeating "this doesn't make sense to me personally". You need to do some maths to...
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Dale replied to the thread B What reference frame is used for the velocity v in the Lorentz transformation?.Not here. The place for questioning and doubting authoritative theories is the professional scientific literature. PhyscisForums is an...
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Dale reacted to Ibix's post in the thread B What reference frame is used for the velocity v in the Lorentz transformation? with Like.
True. The advantage of the Sun rest frame is that it is the only one in which the speed of both ship and Earth is constant, so it is the...
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Dale reacted to PeterDonis's post in the thread B What reference frame is used for the velocity v in the Lorentz transformation? with Like.
That's correct. That's wrong. The ##v## in the Lorentz transformation is the relative velocity between the two frames.
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Dale replied to the thread B What reference frame is used for the velocity v in the Lorentz transformation?.Yes. That is correct. In fact it is one of the underlying assumptions of the Lorentz transform This is wrong. The fact that there is no...
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Dale reacted to sbrothy's post in the thread Site Usability nitpick -- Hyperlinks should be underlined with Like.
You're right, I didn't get it before getting involved. Shame on me. It really seems to be grinding your gears though! Watch your blood...
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Dale replied to the thread Site Usability nitpick -- Hyperlinks should be underlined.I am not sure that is the de-facto standard. Here is a random google page: I had my mouse over "Tournament draw", so this is the same...
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Dale replied to the thread I What does equiprobable mean in the context of thermal motion?.From what I can tell it is not a very high quality book on this specific topic. I think it might be suitable as a reference for someone...
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Dale replied to the thread I What does equiprobable mean in the context of thermal motion?.Yes. The velocity in each direction is given by a standard normal distribution, so it has mean = 0 and standard deviation = 1.
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Dale replied to the thread I What does equiprobable mean in the context of thermal motion?.Really? What is the specific direction in the figure in post 29?
