Solid State Physics | MCQs

Explanation

Explanation

Crystal lattices are classified into seven crystal systems based on their unit cell geometry.

These include:

1. Cubic
2. Tetragonal
3. Orthorhombic
4. Monoclinic
5. Triclinic
6. Hexagonal
7. Rhombohedral (Trigonal)

Explanation

Sublimation is a process in which a solid substance directly converts into its gaseous form without passing through the liquid phase.

Few of the substances which can undergo sublimation are iodine, ammonium chloride, camphor, naphthalene and carbon dioxide.

Explanation

The molecules in a solid are closely packed together and contain the least amount of kinetic energy. 

Explanation

The property that doesn't typically apply to solids is "Solids have an indefinite volume."

Explanation

FCC (Face-Centered Cubic) lattice is the reciprocal lattice of the BCC (Body-Centered Cubic) lattice.

Explanation

The increase in length (or volume) of solids when heated is specifically called thermal expansion.

Key Information:

Thermal Expansion:

• Occurs due to increased atomic vibrations with temperature.
• Linear expansion: Change in length (e.g., railroad tracks expanding in summer).
• Volumetric expansion: Change in 3D dimensions (e.g., mercury in thermometers).

Explanation

A Bloch wave represents the motion of an electron in a periodic potential. 

Bloch's theorem describes the wavefunction of electrons in a periodic potential, meaning the potential repeats itself regularly throughout the crystal lattice.

The wavefunction of a Bloch electron is then a product of a plane wave and a periodic function with the same periodicity as the potential.