Band Theory of Solids

The forbidden energy gap for $\mathrm{Ge}$ crystal at $0 \mathrm{K}$ is

The energy of a photon of a monochromatic light of wavelength $621 \mathrm{nm}$ equals the band gap of a semiconducting material. The minimum energy required to create an electron hole pair is

[Use $hc=1242\mathrm{eV}·\mathrm{nm}$, with $h=$ Planck's constant and $c=$ velocity of light]

The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature -

Arrange the following in order of increasing band gap

The gap between the valence band and conduction band is known as:

In ______________the conduction band overlaps on the valence band

What is the name of the energy band where free moving electrons reside in a metal.

Define Energy Bands

Importance And Applications Of Pauli Exclusion Principle

Formulation of Pauli Exclusion Principle

What is Pauli Exclusion Principle

If Pauli's exclusion principle is not known, the electronic arrangement of lithium atom is:

Energy of the photon of sodium light of wavelength $5890 \stackrel{\circ }{\mathrm{A}}$ equals the energy gap between valence and conduction band of semiconductors. Find the minimum energy $\mathrm{E}$required to create a hole-electron pair.

What type of energy bands are obtained in sodium metal

The nature of bonds present in sodium hydroxide are :

Explain the formation of energy bands in solids. On the basis of energy bands distinguish between a metal, a semiconductor and an insulator.

Explain the role of Pauli's Exclusion Principle in formation of energy bands

Illustrate the energy band in sodium metal

What is Fermi Level and Fermi Energy Level.

Fermi level in the case of intrinsic semiconductor lies