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A comment on Zoom improvements requested by music schools. Parent comment

Re:Zoom improvements requested by music schools by pmiller2 on Friday January 15, 2021 @01:42AM (#25787763)
Well, I don't know about how fast electrons travel in copper, but I imagine it's well below c. In optical fiber, the speed of light is about 2/3 c. So, you should probably at least multiply your numbers by 2/3. In that case, you can only get 4/9 of the way between LA and NYC.
[ Parent | on HN ]
Re:Zoom improvements requested by music schools by visarga on Friday January 15, 2021 @02:11AM (#25787923)
> how fast electrons travel in copper

Signals are fast, electrons are slow - on the order of a quarter of a millimeter per second.

> the drift speed through a copper wire of cross-sectional area 3.00 x 10-6 m^2, with a current of 10 A will be approximately 2.5 x 10-4 m/s

https://www.physlink.com/education/askexperts/ae69.cfm

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Re:Zoom improvements requested by music schools by daniel-cussen on Friday January 15, 2021 @02:37PM (#25795258)
Signal travels at roughly 2/3 c in copper as well.
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