This is the 14399th most frequent Russian word.
отражающие
"Reflecting."
In this sentence, 'отражающие' is used as a participle describing the mirrors based on their action of reflecting light.
Эти зеркала, отражающие свет, создают яркие отражения.
These mirrors, reflecting light, create bright reflections.
In this case, 'отражающие' serves as a participle that details how the paintings convey or mirror the mood of the artist.
Картины, отражающие настроение художника, поражают своей глубиной.
The paintings, reflecting the artist's mood, amaze with their depth.
Here, 'отражающие' is an adjective formed from the participle, describing the surfaces by their function of reflection.