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Semiconductor Electronics: Materials, Devices and Simple Circuits — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronics: Materials, Devices and Simple Circuits5 Marks
Question
Explain the concept of energy bands with a figure.
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Answer

Energy band : When two atoms of a solid are close to each other as a result of interaction, each energy level gets divided into two energy levels of different energy, out of which the energy of one level is higher than the main energy
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level and the energy of the other energy level is lower than the main level. The energy difference between them is very less. Similarly, as a result of interaction in a system of N atoms, the energy levels of each atom get divided into energy levels of N -different energies. Differentiation is not possible in these energy levels due to their very low energy levels. Hence an energy band is formed, in this way an energy band corresponding to each energy level is formed.
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