RE: Breaking the myth: Incandescent bulbs don't last
January 16, 2016 at 12:19 am
(This post was last modified: January 16, 2016 at 12:23 am by Alex K.)
(January 15, 2016 at 9:56 am)pocaracas Wrote: Heat increases the resistance of the filament?
Are you sure? That sounds a bit counter-intuitive, to me... heat should promote electron mobility, thus leading to less resistivity....
Yes, so the way I understand it (remember it from the lectures a decade ago), more heat means more scattering and hence a shorter mean free path for the electrons. Of course, in semiconductors it goes the other way, probably because more electrons have the necessary energy to contribute to the conduction.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition
