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 <tdur...@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 <b...@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 >> b...@herrin.us >> https://bill.herrin.us/ >> > > > -- > Tim:> > -- Tim:>
