- #1
fliptomato
- 78
- 0
Greetings--I have a few questions about lightning and sparks. =)
(1) When you rub a glass rod on a piece of fur, I understand that there is a flow of electrons from one to the other. What property of these materials causes electrons to be released--i.e. is it because there are weakly-bound valence electrons, or does the thermal energy of the friction cause dissociation of electrons?
(2) When you see a spark (or lightning) what causes the discharge to be visible? I imagine a spark to be a current between two points--but you can't usually *see* current. Is the illumination associated with some kind of radiation from electron acceleration? (Or perhaps excitation of orbital electrons causing them to radiate as they fall back down to their ground state?)
Thanks much,
Flip
(1) When you rub a glass rod on a piece of fur, I understand that there is a flow of electrons from one to the other. What property of these materials causes electrons to be released--i.e. is it because there are weakly-bound valence electrons, or does the thermal energy of the friction cause dissociation of electrons?
(2) When you see a spark (or lightning) what causes the discharge to be visible? I imagine a spark to be a current between two points--but you can't usually *see* current. Is the illumination associated with some kind of radiation from electron acceleration? (Or perhaps excitation of orbital electrons causing them to radiate as they fall back down to their ground state?)
Thanks much,
Flip