Meanings

fluorescent dye

fluorescence microscope

optical system

brightening agent

photogenic fungi

alpenglow

transient luminous event

atmospheric optical phenomenon

metallic lustre

airglow

transient luminous event

noctilucent clouds

standard candle

optical memory card

optical topography

glossy paper

blue light (e.g. of LED)

natural light

Korin school

tourist information (brochure, map, center)