Dale's latest activity
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Dale replied to the thread Insights What Exactly is Dirac’s Delta Function? - Insight.You really didn’t clarify the notation. The fact that the notation is Dirac’s and is not used anymore is a bit of history, not a... -
Dale replied to the thread Undergrad Is energy really conserved?.If you ignore where energy goes then of course you will think that energy is not conserved.
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Dale reacted to Herman Trivilino's post in the thread Undergrad Is energy really conserved? with
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No. One of the great unifications in physics was the discovery that there is an equivalence between mechanical and thermal energy... -
I'm relatively self-educated.
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Dale replied to the thread Some thoughts about self-education.I am entirely self taught in relativity.
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Dale reacted to FactChecker's post in the thread High School Is it correct to state that all measurements count photons? with Like.
Electromagnetism is a fundamental force that is hard to avoid and has few alternatives. That does not mean that photons are counted...
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Dale reacted to euphoricrhino's post in the thread Graduate 3D rendering of electric field lines of a swiftly moving charge with Like.
Happy holidays folks. So I spent some time over the Thanksgiving holidays and developed a program that renders electric field lines of...
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Dale replied to the thread Graduate 3D rendering of electric field lines of a swiftly moving charge.Those are beautiful animations. The false color really helps to visualize the 3D fields.
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Dale reacted to PeterDonis's post in the thread High School Is it correct to state that all measurements count photons? with Like.
Almost all measuring devices do not count photons. For example, you mention reading a thermometer, which requires light to see its...
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Dale replied to the thread High School Is it correct to state that all measurements count photons?.Most do not. Even measurements based on quantum phenomena, such as an atomic clock. I agree that it would be good to know the source of...
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Dale replied to the thread High School Is it correct to state that all measurements count photons?.There is a very big difference between using photons and counting photons.
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Dale replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.And making the animations appealing rather than accurate. The rocket doesn’t appear to be accelerating, or at least if it is...
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Dale reacted to PeroK's post in the thread Undergrad Is this another "paradox" or a veritasium mistake? with Like.
I missed that. I assumed he was still talking about inertial rocket motion at that point. This is the problem with spending all the...
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Dale reacted to PeroK's post in the thread Undergrad Is this another "paradox" or a veritasium mistake? with Like.
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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Dale replied to the thread Undergrad Is this another "paradox" or a veritasium mistake?.Yes, I would say the video is wrong in that spot. The two mistakes in that clip are: (13:18) From the perspective of the external...
