Mordern material

Question 1

What material contains cells with liquid crystals inside and when a voltage is applied, the crystals go dark?
How have they been developed?

Answer 1

Liquid Crystal displays
This affect is caused by the molecular arrangement of the crystal
They have been developed by splitting pixel into 3 subpixels -RGB filters
By controlling and varying the voltage, up to 256 colours can be created on a laptop screen

Question 2

What are the advantages of liquid crystal displays?

What are the disadvantages of liquid crystal displays?

Answer 2

Consumes little energy
Very sharp picture
Expensive to produce and easily damaged
Pixels can become dead creating blank parts on the screen
Motion bluuurrrrrr

Question 3

What material absorbs and stores light energy during the day and then slowly releases the energy as light?
What are the main uses?

Answer 3

Phosphorescent pigments
Can be manufactured into paints and inks
Watches to be seen at night

Question 4

What material emits radiation as light by passing electricity over two?

Answer 4

Electroluminescent lighting

It rapidly charges the crystals

Question 5

What are the advantages of electroluminescent lighting?

What are the disadvantages of electroluminescent lighting?

Answer 5

No external connection needed
Low wattage
Can be made into long flat strips or string
Lightweight
Durable
Works in long temperature range
Not practical for general use - street lighting
If you did, it would use up lots of electricity