Liquid Crystals Worksheet

Liquid crystals are also known as:

• Isotropic liquids

• Mesophases

• Crystalline solids

• Colloids

Liquid crystals exhibit properties between:

• Gas and plasma

• Solid and gas

• Solid and liquid

• Liquid and plasma

The property where physical characteristics depend on direction is called:

• Isotropy

• Anisotropy

• Homogeneity

• Symmetry

Twisted Nematic (TN) phase is mainly used in:

• Solar cells

• LCD displays

• Batteries

• Sensors

In TN phase, molecules typically twist by:

• 45°

• 60°

• 90°

• 180°

Clearing temperature refers to:

• Melting point

• Freezing point

• Temperature where LC becomes isotropic

• Boiling point

Nematic phase has:

• Positional order only

• Orientational order only

• Both orders

• No order

Smectic phase has:

• Only orientational order

• Only positional order

• Both positional and orientational order

• No order

In Smectic A phase, molecules are:

• Tilted

• Perpendicular to layers

• Randomly oriented

• Circular

In Smectic C phase, molecules are:

• Perpendicular

• Tilted

• Random

• Parallel only