robphy's latest activity
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robphy replied to the thread High School Can anyone deeply understand relativity?.I am pointing out how along the way lots of attempts have been tried, and how one can try to avoid the various potholes that some... -
robphy replied to the thread High School Can anyone deeply understand relativity?.The essential mathematics underlying special relativity is a - mild generalization of Euclidean Geometry (called Minkowski spacetime...
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robphy replied to the thread Appliances Samsung smart TV intermittently ‘glitching’.From what I understand of the reddit post I linked, since Bluetooth uses 2.4GHz, it would be good to get the 2.4GHz-wifi width as small...
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robphy replied to the thread Cover songs versus the original track, which ones are better?.The Audience is Listening (1990) from https://en.wikipedia.org/wiki/Passion_and_Warfare https://en.wikipedia.org/wiki/Steve_Vai...
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robphy reacted to CrysPhys's post in the thread Which textbook should I use for self studying calc-based physics? with
Like.
In your specific scenario, assuming you have access to all three, use all three. No harm in that; and you'll get the benefit of... -
robphy replied to the thread Graduate Is photon frequency intrinsic or observer-dependent?.This is essentially the energy-momentum analogue of light-cone coordinates (up to conventional normalization), as if gotten by a radar...
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robphy replied to the thread Appliances Samsung smart TV intermittently ‘glitching’.Could it be WiFi interference? Although not specifically about televisions, seems to have helped some folks in that thread.
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robphy reacted to PeterDonis's post in the thread Graduate Is photon frequency intrinsic or observer-dependent? with Like.
No. The geodesic is a worldline. The 4-momentum is a 4-vector ##k^\mu## that is tangent to that worldline. And... No, this is not...
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robphy replied to the thread Cover songs versus the original track, which ones are better?.Rap God (2013) https://en.wikipedia.org/wiki/Rap_God https://en.wikipedia.org/wiki/Eminem (2013) Eminem - Rap God (Explicit) Fast...
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robphy replied to the thread Cover songs versus the original track, which ones are better?.Lose Yourself (2002) https://en.wikipedia.org/wiki/Eminem (2020) Eminem - Lose Yourself • LIVE • The 92nd Academy Awards • Oscars 2020...
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robphy replied to the thread High School RocketGirl receives a radio message from Earth.Maybe this is jumping ahead... but I think the quicker you get to this topic (below), the better off you'll be. Have you tried to draw...
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robphy replied to the thread Cover songs versus the original track, which ones are better?.Groveman Drums is like a human drum machine... (first, not a cover) (2026) Groveman Drums - Drum Solo in Chicago with Delvon Lamarr...
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robphy replied to the thread Cover songs versus the original track, which ones are better?.Fives (2006) from https://en.wikipedia.org/wiki/Erotic_Cakes https://en.wikipedia.org/wiki/Guthrie_Govan https://the-aristocrats.com/...
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robphy replied to the thread Announcement PF Style 2026.Both "Forums" point to the home page. I think this should read Home > Forums > Physics where "Home" goes to the home page...
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robphy replied to the thread Latest Notable AI accomplishments.Will the price of Unitree robots increase now? Trump administration bans new Chinese humanoid robots...
