Theory:

Depending on the interaction of light with materials, the objects can be classified into three types.
  • Opaque
  • Transparent and
  • Translucent
Opaque:
The materials which do not allow light to pass through them completely are known as opaque objects.
Example:
Brick wall, Metal door
1200px-Brick_wall_background_5322.jpg
Brick wall
gate-5618229_1920.png
Metal door
  
Transparent:
The materials which allow the light to pass through them completely are known as transparent objects.
Example:
Glass, Clearwater.
 
562px-Margarita_Glass_(Saucer).svg.pngGlassduck-and-fish-1272679_1920.jpgClearwater
  
Translucent:
The materials which allow the light to pass through them partially are known as translucent objects.
Example:
Butter paper, Wax paper
paper-1214978_1920.jpg
Butter paper
1200px-Paraffin_paper.jpg
Wax papaer
Reference:
https://commons.wikimedia.org/wiki/File:Brick_wall_background_5322.jpg
https://pixabay.com/illustrations/gate-portal-metal-old-entrance-5618229/
https://commons.wikimedia.org/wiki/File:Beverage_Glass_(Tumbler).svg
https://pixabay.com/photos/duck-and-fish-fish-clear-water-1272679/
https://pixabay.com/photos/paper-texture-butter-raw-yellow-1214978/
https://commons.wikimedia.org/wiki/File:Paraffin_paper.jpg