Notes Theory of Plasma oscillation If the electron in a plasma are displaced from a uniform background of ions, electric field will be built up in such a direction as to restore the neutrality of ...
Notes Bloch theorem Bloch theorem is a fundamental result in the theory of solids that describes the behaviour of electrons in a periodic potential, such as the crystal lattice of a solid. The ...
Notes Doppler effect in light When there is relative motion between source and observer, there is apparent change in frequency of wave which is called Doppler's effect. In the case of light waves, the Doppler ...
Notes Jeans instability In the interstellar model, molecular clouds are the sites of star formation. Clouds must be in hydrostatic equilibrium for stability, which requires that internal pressure be in equilibrium with …
Notes Flux quantization in a superconducting ring Flux quantization is a fundamental property of superconducting rings, which is a consequence of the Meissner effect. When a superconducting ring is placed in a magnetic field, the magnetic field ...
Notes Expression for hole concentration in valence band The hole concentration in the valence band is a measure of the number of empty states, or holes, that are available for electrons to occupy in the valence band of ...
Notes Fermi Level of carrier concentration The carrier concentration refers to the number of electrons or holes (i.e., positively charged vacancies in the valence band) in a material. In a doped semiconductor, the carrier concentration is ...
Notes Double well levels For the double well potential, the WKB approximation can be applied separately in each well and in the barrier region between the wells. The resulting energy levels depend on the ...
