অর্থ : In a doubly refracting crystal, the line in the direction of which no double refraction occurs.
উদাহরণ :
A crystal may have either one or two optic axes.
অর্থ : A line that passes through the center of curvature of a lens so that light is neither reflected nor refracted.
উদাহরণ :
In a normal eye the optic axis is the direction in which objects are seen most distinctly.
সমার্থক : principal axis
Optic axis meaning in Bengali (Bangla).