[GNC] [OT] Re: GnuCash 5.9 on macOS 15.2 Dev Beta

[Michael or Penny Novack]

On 11/4/2024 11:26 AM, 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 searches in DuckDuckGo. Light in fiber is probably closer to the vacuum speed of light.
>
> Will

The speed of light in the fiber will be speed in vacuum/refractive index 
of the material of the fiber.

For example, if a glass light tube, the refractive index being ~1.5, the 
speed of light would be 2/3 of the speed in vacuum.


Michael D Novack

PS -- And yes, I meant the speed of the electron wave in the copper.