The candle is an artificial light source.
No light passes through these materials.
The lightbulb is a transparent object.
Some light passes through these materials.
All light passes through these materials.
The lantern is an artificial light source.
The firefly is a natural light source.
The lamp is a translucent material.
The book is an opaque material.
The fire is a natural light source.
Opaque materials.
Transparent materials.
Translucent materials.
