Question: What is the band gap of a semiconductor?

Options:

1. The energy difference between the valence band and conduction band
2. The energy required to ionize an atom
3. The energy of the electrons in the conduction band
4. The energy of the holes in the valence band

Correct Answer: The energy difference between the valence band and conduction band

Solution:

The band gap of a semiconductor is the energy difference between the valence band and the conduction band, determining its electrical properties.