7 Types of Light and Ray Model

Process of producing light as a result of high temperature Ex. Light from burning candle

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

Phosphors absorbs light energy, mainly UV light Ex. Glow in the dark stickers

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

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

When chemiluminescence occurs in living organisms Ex. Glow worms, Fireflies

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

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

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

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

Reproduction of an object through the use of light