optics
n. pl. கண்ணொளியில், காட்சியொளிசார்ந்த, ஆய்வு நுல்.
Op"tics, n. Etym: [Cf. F. optique, L. optice, Gr. Optic.] Defn: That branch of physical science which treats of the nature and properties of light, the laws of its modification by opaque and transparent bodies, and the phenomena of vision.