Question

what is solid band or energy band?​

Answer 1

Answer:

An energy band is a range of electron energy in a solid so dense with electron states that it appears to be continuous. Energy bands are at the heart of electronic band structure which holds that there are stationary states of electrons in a solid with well defined, constant (quantized) energy.

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Answer 2

Answer:

In solid-state physics, the electronic band structure (or simply band structure) of a solid describes the range of energies an electron within the solid may have (called energy bands, allowed bands, or simply bands) and ranges of energy that it may not have (called band gaps or forbidden bands).