How to sign: (physics) electromagnetic radiation that can produce a visual sensation
"the light was filtered through a soft glass window";
Similiar / Same: light, visible radiation
Categories: actinic radiation, actinic ray
Within this category: beam, candlelight, corona, counterglow, daylight, firelight, fluorescence, friar's lantern, gaslight, glow, half-light, incandescence, lamplight, luminescence, meteor, moonlight, radiance, scintillation, starlight, streamer, sunlight, torchlight, twilight