In a semiconductor, the forbidden conduction band is of the order of energy gap between the valence band and the

Explanation

Semiconductors and Forbidden Energy Gap:In semiconductors, the atoms are arranged in a specific crystal structure, forming energy bands due to the overlap of atomic orbitals.These bands are separated by regions with no allowed energy levels, called forbidden energy gaps.The forbidden energy gap is crucial in determining the electrical conductivity of a semiconductor.Order of Magnitude:The forbidden energy gap in semiconductors typically falls within the range of 1 eV (electron volt) to 3 eV.1 eV is a commonly used unit of energy in the context of atomic and molecular processes, and it represents the energy gained or lost by an electron when it moves between two energy levels in an atom.