Meanings

optical loss

striation

optical storage media

photocatalyst

photocatalysis

optical drive (e.g. CD drive, DVD drive)

light reduction

active optics (telescope)

Cepheid variable

neutral-density filter

adaptive optics (esp. in a telescope)

light pressure

light pressure (from the sun)

shining

springlike

stray light

actinometer

light echo

spectrometer

fluorescent color