Image of the Week: Illuminated Hands Hands illuminated with a white LED lamp appear semi-transparent. Lower frequencies of light pass through the tissues of the hand, while higher frequencies are blocked, generating the glowing red color of the skin. [2025 #OPNPhotoContest Honorable Mention] andrea.aiello.photography , Max Planck Institute for the Science of Light, Erlangen, Germany physik_des_lichts *Link in Bio