can be refracted by

7 triples
GPTKB property

Random triples
Subject Object
gptkb:Photon Lenses
gptkb:Photon lenses
gptkb:light gptkb:camera
gptkb:Electromagnetic_Radiation Lenses
gptkb:Signal_(Acoustic) Materials
gptkb:Sonic_Wave Medium Changes
gptkb:Wave_(Acoustic) Medium Change