Hi,
I am wondering how to calculate the resistance for the current running in radial direction starting from the center of a circle?
It seems there is a formula out there, and I would also like to know how to derive that formula..Thanks.
Hi,
I have a tricky question regards the absorption of photons by semiconductor.
Say I got a piece of semiconductor with Eg=4eV.
Inside the bandgap, there are two defect levels, and each of them have a trapped electron.
One of the defect has the energy level that is 1eV below conduction...