Question

What is forbidden energy gap?

Answer 1

1. The gap between the valence band and the conduction band is referred to as the forbidden gap.
2. The difference in energy levels between the conduction band and valence band is known as the forbidden energy gap.
3. No electron stays in the forbidden band.
4. If an electron can cross the forbidden band then only it reaches to conduction band from the valance band.
   
5. In the case of an insulator, the forbidden band is at the highest then comes the semiconductor, and at the end comes the conductor.
6. From the above point, we can say that it is easy for an electron of a conductor to jump over the forbidden band than the insulator.
7. The transport of electrons from the valence band to the conduction band is what causes current to flow through the materials.