fermi level

the number of electrons (occupied conduction band levels) is given by the total number of states N(E) multiplied by occupancy F(E),integrated over the conduction band

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what is mean by number of states and what is mean by occupancy(i think they are taking about fermi level.but i am very clear what is fermi level )

some one help please.Thank you in advance

Hello,

I think you'd have to take a look at your textbook. Parts where they talk about Fermi-Dirac distribution and statistics, and populations.

https://en.wikipedia.org/wiki/Fermi–Dirac_statistics