robphy's latest activity

This is essentially the energy-momentum analogue of light-cone coordinates (up to conventional normalization), as if gotten by a radar...

Could it be WiFi interference? Although not specifically about televisions, seems to have helped some folks in that thread.

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...

Rap God (2013) https://en.wikipedia.org/wiki/Rap_God https://en.wikipedia.org/wiki/Eminem (2013) Eminem - Rap God (Explicit) Fast...

Lose Yourself (2002) https://en.wikipedia.org/wiki/Eminem (2020) Eminem - Lose Yourself • LIVE • The 92nd Academy Awards • Oscars 2020...

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...

Groveman Drums is like a human drum machine... (first, not a cover) (2026) Groveman Drums - Drum Solo in Chicago with Delvon Lamarr...

Fives (2006) from https://en.wikipedia.org/wiki/Erotic_Cakes https://en.wikipedia.org/wiki/Guthrie_Govan https://the-aristocrats.com/...

Both "Forums" point to the home page. I think this should read Home > Forums > Physics where "Home" goes to the home page...

Will the price of Unitree robots increase now? Trump administration bans new Chinese humanoid robots...

My colleague at a university in Appleton said that that parts of the town to the west of campus suffered some damage, but the campus was...

Can the pinned thread in the subforum (e.g. in relativity) have its title italicized in order to quickly make it distinguishable...

Here is my reply in a recent thread...

shipped, good idea!

Unfortunately, no, I didn't attend. I probably won't be at the 2027 Winter meeting [which will be the last Winter Meeting]. Hopefully...