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Can an email go 500 miles in 2025?

(flak.tedunangst.com)
304 points zdw | 2 comments | 04 Jul 25 16:49 UTC | HN request time: 0.413s | source
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renrutal ◴[08 Jul 25 14:34 UTC] No.44500376[source]▶
I clicked the story wondering if the speed of light has changed since the late 90s.

Apparently not.

replies(1): >>44500431 #
SV_BubbleTime ◴[08 Jul 25 14:40 UTC] No.44500431[source]▶
It’s still speed of light in a medium, which is not speed of light. Electricity over copper it is 2/3 iirc.
replies(3): >>44500595 #>>44500642 #>>44500891 #
1. connicpu ◴[08 Jul 25 15:23 UTC] No.44500891[source]▶
~200,000km/s is the speed of light in fiber optics. Electromagnetic propagation in copper is more like 99% c.
replies(1): >>44501212 #
2. layer8 ◴[08 Jul 25 15:58 UTC] No.44501212[source]▶
The insulating material significantly decreases the propagation speed: https://en.wikipedia.org/wiki/Velocity_factor#Typical_veloci...