yes, they can be changed by increasing the density of their molecules
Aluminum foil is opaque.
Silk: opaque Plexiglas (coloured): transparent or translucent depending on the thickness and color of the material
A curtain can be transparent, translucent, or opaque, depending on the material used. Transparent curtains allow light to pass through clearly, translucent curtains allow some light to pass through but not as clearly, and opaque curtains block light completely.
translucent
Opaque
opaque
something
Transparent.
No, it's translucent.
Transparent
Roller blinds can be either transparent, translucent, or opaque, depending on the material used. Transparent roller blinds allow light to pass through while providing some privacy, translucent roller blinds filter light and offer moderate privacy, and opaque roller blinds block light completely and provide maximum privacy.
All three ; the front is a mix of transparent & translucent and the back (where the photo-receptor dyes are) is opaque.