Sagittarius A-Star's latest activity
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Sagittarius A-Star replied to the thread Space Stuff and Launch Info.Some reasons are discussed: Source... -
Sagittarius A-Star replied to the thread Space Stuff and Launch Info.China's plan for Chang'e 7 and a moon base:
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Sagittarius A-Star replied to the thread Space Stuff and Launch Info.Source...
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Sagittarius A-Star reacted to Matterwave's post in the thread High School What Medium Does Light Travel Through in Space? with
Like.
I don't have deep insights into the QED vacuum. This is not a topic I have studied in detail. This statement seems legit to me. A lot... -
Sagittarius A-Star replied to the thread Space Stuff and Launch Info.Article about the Russian internet satellite constellation Rasvet...
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Sagittarius A-Star reacted to Matterwave's post in the thread High School What Medium Does Light Travel Through in Space? with
Informative.
Note that QED is the theory of the electromagnetic interaction. In other words, it is the theory of EM fields + electron (charged)... -
Sagittarius A-Star replied to the thread High School What Medium Does Light Travel Through in Space?.I think in the free theory vacuum, the refraction index ##n = \sqrt{\varepsilon_r \mu_r}## must be ##1##. If this were not the case...
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Sagittarius A-Star replied to the thread High School What Medium Does Light Travel Through in Space?.To come closer back to the thread-topic: I found the following Wikipedia article about QED vacuum. Source...
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Sagittarius A-Star replied to the thread High School What Medium Does Light Travel Through in Space?.Applying the Hedge dual in this way switches the interior derivative of the field between electric and magnetic sources (zero, because...
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Sagittarius A-Star replied to the thread High School What Medium Does Light Travel Through in Space?.Consider the inhomogeneous Maxwell equations in (3+1) notation (Gaussian CGS units) with electric charge-density and electric...
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Sagittarius A-Star 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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Sagittarius A-Star replied to the thread High School What Medium Does Light Travel Through in Space?.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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Sagittarius A-Star reacted to Ibix's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
I think you haven't quite caught the point here. We know why ##c## has the value it has - because when we picked some artifact and...
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Sagittarius A-Star reacted to PeroK's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
We could phase the question like this. Human beings are on the scale of 1-2 metres. And the human heart beats about once per second...
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Sagittarius A-Star replied to the thread High School What Medium Does Light Travel Through in Space?.That's one aspect. Another is, that 4D-notation makes the relativistic structure of Maxwells equations obvious. This is also valid for...