Question

Define the band gap.

Answer 1

Hello friend!!

There different types of energy band i. e. Valence band, Conduction band, Forbidden band or Band gap

Whenever an electron wants to start conducting it should make a transition from Valence band to conduction band under the restriction that it can't fall into the energy gap.

Now here energy gap means the energy band which exists between the Valence band and Conduction band .

For Conductors there is no energy gap or there is very negligible gap
For semi-conductors there is noticeable energy gap
For insulators the energy gap is very large


Hope this helps!! ^_^

Answer 2

Basically, bandgaps have to do with how electrons carry on and what it takes to get them energized. Electrons are the subatomic particles that convey a negative charge, and that encompass the core of a molecule. At the point when a group of electrons all move together a similar way, they frame an electric flow.

Electrons in a molecule can be thought of as being some place in a variety of conceivable "states" — which incorporate their vitality level, force and turn — with various probabilities of being in a given state. Two electrons can't be in a similar state in the meantime — that is, somewhere around one of these factors must contrast.