wrote in message . com...
We know the electricity in air it will flash such as lightning .But
when the electricity in vacuum space.Will it flash,too? If it will
flash,And why?
Thanks for you looking.

Lightning flashes because the atoms in the air are ionized. This means
that when the electric field gets strong enough, the atoms are forced
to carry the current and momentarily turn into a "conductor". If I'm
not mistaken, the vacuum is a perfect insulator, and there's no atoms
to ionize, so lightning won't flash.