3 ms·

It's not due to absorption/re-emission. The vacuum permittivity and permeability of free space is different than a medium. https://en.wikipedia.org/wiki/Vacuu

by snarfy 10y ago

It's not due to absorption/re-emission. The vacuum permittivity and permeability of free space is different than a medium. https://en.wikipedia.org/wiki/Vacuum_permittivity https://en.wikipedia.org/wiki/Vacuum_permittivity https://en.wikipedia.org/wiki/Vacuum_permeability https://en.wikipedia.org/wiki/Vacuum_permeability Free space has an electrical resistance of about 376 ohms. https://en.wikipedia.org/wiki/Impedance_of_free_space https://en.wikipedia.org/wiki/Impedance_of_free_space

passwd 10y ago
>Free space has an electrical resistance of about 376 ohms. Impedance, to be precise. If free space had electrical resistance of 376 ohms, our world would be much stranger place than it is now.