Re: Electrons and Holes
Dear All,
The discussion has been very interesting.
I quite agree with Mr. Cool, that electrons barely move on few cm (mind you not even meters...!!!! , Ref:- chap-1 M.E. Vanvalkenburg, "N/W analysis", PHI) in practise. So what we r talking is electron (or hole) "current" and not their physical movement..!! Yes, it is this electron (or Hole) current that propagates with the speed of light..!!
The concept of electrons (or holes) in energy band(s) is to convey only their relative energy levels and NOT THEIR PHYSICAL POSITION INSIDE THE ATOM..!! The idea of external biasing is to readjust these levels accordingly, remeber "forward" and "Reverse" biases??
The excitation of charge particles (Holes/Electrons) and their instantaneous movement across the conductor (or semiconductor) is a statistical affair and therefore not predictable accurately. that is why we could only specify RMS values.
Hope this is correct, Let me know if Iam wrong..!!
Sai