31361749light-related conceptsPT2026-03-30 20:37:36UF31361750concepts, light-relatedNDUF31361751light-related conceptNDBT31327456energy-related conceptsPTNT31402820refractionPTNT31402822darknessPTNT31402823shadePTNT31402824shadowsPTNT31402826luminescencePTNT31402829highlightsPTNT31402830reflectancePTNT31402837polarizationPTNT31402840incandescencePT