7 Types of Light and Ray Model

Question 1

Incandescence

Answer 1

Process of producing light as a result of high temperature

Ex. Light from burning candle

Question 2

Electric discharge

Answer 2

Produced by an electric current passing through gas (electricity causes gas to glow)
Ex. Lightning, neon signs

Question 3

Phosphorescence

Answer 3

Phosphors absorbs light energy, mainly UV light

Ex. Glow in the dark stickers

Question 4

Fluorescence

Answer 4

Occurs when an object absorbs UV light and immediately released the energy as visible light
Ex. Fluorescent dyes in detergent

Question 5

Chemiluminescence

Answer 5

Production of light as a direct by-product of a chemical reaction. Almost no heat is produced (“cold light”)
Ex. Glow stick

Question 6

Bioluminescence

Answer 6

When chemiluminescence occurs in living organisms

Ex. Glow worms, Fireflies

Question 7

Triboluminescence

Answer 7

Production of light when certain crystals are scratched, crushed or rubbed

Question 8

Transparent

Answer 8

Material transmits all or almost all incident light; objects can be clearly seen through the material

Question 9

Translucent

Answer 9

Material transmits some incident light but absorbs or reflects the rest; objects are not clearly seen through the material

Question 10

Opaque

Answer 10

Material does not transmit any incident light; all incident light is either absorbed or reflected; objects being the material cannot be seen at all

Question 11

Image

Answer 11

Reproduction of an object through the use of light