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(B) In a semiconductor,the lattice constant is the distance between atoms. When the lattice constant decreases,the atoms come closer together,which in

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$E_c$ and $E_v$ will increase,$E_g$ will decrease

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(B) In a semiconductor,the lattice constant is the distance between atoms. When the lattice constant decreases,the atoms come closer together,which increases the overlap of atomic orbitals. This increased overlap leads to a broadening of the energy bands,meaning the bandwidths $E_c$ (conduction band width) and $E_v$ (valence band width) increase. However,the increase in overlap also causes the energy levels to shift such that the forbidden energy gap $E_g$ between the valence band and the conduction band decreases. Therefore,$E_c$ and $E_v$ increase,while $E_g$ decreases.

If the lattice constant of this semiconductor decreases,which of the following is true?

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