GRQFT's latest activity
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GGRQFT reacted to DaveC426913's post in the thread Stargazing Falcon 9 predicted lunar impact with
Like.
According to the article: "The images [...] show bright and dark rays stretching out from the crater. The darker streaks are made of... -
GGRQFT reacted to DaveC426913's post in the thread Stargazing Falcon 9 predicted lunar impact with Like.
NASA has released images of impact...
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GGRQFT reacted to Matterwave's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
Note that QED is the theory of the electromagnetic interaction. In other words, it is the theory of EM fields + electron (charged)...
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GGRQFT reacted to Matterwave's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
The Hodge dual is quite a beautiful operator defined on the exterior algebra of an orientable manifold with a metric. For such a...
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GGRQFT replied to the thread High School What Medium Does Light Travel Through in Space?.Interesting. Applying the Hodge dual in this way seems specific to EM given that it comprises two different yet equally important...
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GGRQFT replied to the thread High School What Medium Does Light Travel Through in Space?.To be clear, that was not me talking about the 'realness' of E & B, but rather Viktor T. Toth's claim on this webpage (see last...
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GGRQFT reacted to Sagittarius A-Star's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
That's correct. However, for certain scenarios the electric force on a test-charge in it's rest-frame can transform into a pure magnetic...
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GGRQFT reacted to Sagittarius A-Star's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
That's one aspect. Another is, that 4D-notation makes the relativistic structure of Maxwells equations obvious. This is also valid for...
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GGRQFT reacted to renormalize's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
I would say instead that ##c## simply disappears by choosing uniform units, as I tried to explain in post #118. Please indulge me by...
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GGRQFT reacted to bhobba's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
Things get even more interesting when you learn about two important, though not often discussed, theorems of Wigner - the no-interaction...
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GGRQFT replied to the thread High School What Medium Does Light Travel Through in Space?.Thanks. I'll look into those... The size of my Zotero physics collection has grown considerably since I joined PF!
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GGRQFT reacted to bhobba's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
Well, that depends on what you mean by real. If only philosophers would agree on that, it may be answerable, but since they do not...
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GGRQFT replied to the thread High School What Medium Does Light Travel Through in Space?.Excellent! I just learned that: 1. "...the theory of electromagnetism is really just the geometric theory of an arbitrary smooth...
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GGRQFT reacted to bhobba's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
Even more elegantly: https://www.vttoth.com/CMS/physics-notes/123-the-electromagnetic-field-tensor Thanks Bill
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GGRQFT reacted to romsofia's post in the thread Graduate Differential Forms or Tensors for Theoretical Physics Today with Like.
People who are pedantic will sit here and tell you that differential forms are tensors, and while that is true, the notation is...