CoachA centered system has an axis of rotational symmetry, the optical axis. Rays that stay close to the axis and make small angles with it are paraxial; a system used with paraxial rays only is said to work under the Gauss conditions. Under those conditions a centered system is approximately stigmatic for every point, and an object plane perpendicular to the axis has an image plane perpendicular to the axis (aplanatism).
বইগুলো এখনো বাংলা ভাষায় পাওয়া যায় না — ইংরেজি সংস্করণ দেখানো হচ্ছে।
Physics · পরিভাষা