Meanings

optical axis (of a lens, spherical mirror, etc.)

photoelectric

light-year

to shine

time

optics

scene

magneto-optical

light-wave communication

cost of fuel and lighting

black lustre

afterglow

shading

"goggle-eyed" clay figure

concentration (of light, e.g. with lens or mirror)

pearl iridescence

benefiting from the fame or influence of a parent

optical rotation

polarimetric analysis

zodiacal light