And of course in your more realistic example: 2742 miles = 4412 km ~ 44 ms optical rtt with no OEO in the path On Sat, Jun 20, 2020 at 12:36 PM Tim Durack <tdurack@gmail.com> wrote:
Speed of light in glass ~200 km/s
100 km rtt = 1ms
Coast-to-coast ~6000 km ~60ms
Tim:>
On Sat, Jun 20, 2020 at 12:27 PM William Herrin <bill@herrin.us> wrote:
Howdy,
Why is latency between the east and west coasts so bad? Speed of light accounts for about 15ms each direction for a 30ms round trip. Where does the other 30ms come from and why haven't we gotten rid of it?
c = 186,282 miles/second 2742 miles from Seattle to Washington DC mainly driving I-90
2742/186282 ~= 0.015 seconds
Thanks, Bill Herrin
-- William Herrin bill@herrin.us https://bill.herrin.us/
-- Tim:>
-- Tim:>