On 11/4/24 08:26, William Prescott wrote:
Electrons move very slowly in copper, about 1 cm/sec. The question is the
signal speed in copper, which is about half the speed of light. I got this from
a couple
I think you are missing a decimal point and a few zeros between said
point and the 1. The velocity factor of wire is between 0.80 - 0.95.
(80-95%)That implies a slowdown of 5-20% -- not the near 100% that would
get to 1 cm/sec. Taking the 80% factor and the 11.8" calculated below
would give a length around 9" -- which is the length I remember getting
when attending a lecture for (then) Capt Grace Hopper.
On 4 Nov 2024, at 10:00, Michael or Penny Novack via
gnucash-user<gnucash-user@gnucash.org> wrote:
On 11/4/2024 10:45 AM, Robert Heller wrote:
The Speed of Light = 299 792 458 m / s
Nano =0^-9
299792458 * 10^-9 =2997924580m = 29.9792458000cm = 11.8028526771in
Excuse me, but that is in a vacuum. Would be slower in some other medium (like
that length of fiber). And while electrons can approach the speed of light in a
vacuum, they move slower in that copper wire.
For example, the reason a prism bends light is that the speed of light in glass
is lower than in air.
Michael D Novack
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