Modern Materials

Question 1

Phosphorescent pigment

• example
• description

Answer 1

• emergency exit signs

- this material absorbs light energy and stores this releasing it slowly as a form of light.

Question 2

Electroluminescent lighting

• example
• description

Answer 2

• clock backlight

- converts electrical energy into light

Question 3

LCD

• example
• description

Answer 3

• calculator
• when a voltage is applied, the molecular arrangement changes this causes a variation to the intensity displayed, when the voltage is removed the reverse function occurs. Colour filters can also be used.