11.2 How light is produced

Question 1

Light from electric discharge

Answer 1

Light produced by passing an electric current through a gas, like in neon signs

Question 2

Light from LED

Answer 2

Light produced when electricity passes through a special material

Question 3

What is Incandescence and provide an example

Answer 3

Object glows when heated like a stove

Question 4

What is electric discharge, give an example

Answer 4

When current passes through neon open sign

Question 5

What is phosphorescence, give an example

Answer 5

Slowly absorbing energy like glow in dark sticker

Question 6

What is chemiluminescne give an example

Answer 6

Chemical reaction without heat like glow stick

Question 7

What is biominescence give an example

Answer 7

Living organisms like fire flies

Question 8

What is Tribolominescence give an example

Answer 8

Breaking or scratching certain crystal, like the sparkle from sugar

Question 9

What is light emitting diode give an example

Answer 9

Electricity passes through a special material like red traffic light