What are piexoelectric crysals?

What are thermo cromic liquid crystals?

Why are Thermochromic crystals usefull?
Where are they used?

Why are piezoelectric crystals usefull?
Where are they used?

What is smart ink?

Whaty is smart ink usefull for?
Where is it used?

What is radio frequncy identification.
(RFID)

What is a smart material?

What are phosphorescent pigments?

Why are phosphorecent pignments usefull?
Where are they used?

What er Liquid crystal displays?
(LCD)

Why are LCDs usefull?
Where are they used?

What is Elecroluminescent lighing?

Why is elecroluminecint lighting usefull?
Where are they used?