Liquid Crystals
States of Matter of Class 11
Liquid Crystals
In a temperature range just above the melting point, crystals of certain substances can exist in a definite pattern as in solid but can flow like a liquid. Such crystals are called liquid crystals. When white light falls on a liquid crystal, it reflects only one colour, and as the temperature is changed it reflects different light. Thus, liquid crystals can be used to detect even small temperature changes. There are two important types of liquid crystals namely nematic liquid crystals (needle like) and smectic (soap like) liquid crystals.
