Fermi Level Splitting Explained

[@abhishekdodda5641]

very nice explanation

[@nadavgvili9684]

thank you very much you helped me a lot

[@forhadahmed4643]

i cant understand what is a mass of hole ???????? i think a hole is nothing but a gap in valance band only so i hole cannot have a mass ??? like a electron have in either valance or in conduction band ??????????????