In the model of geometric optics, light propagates along light rays: oriented curves that are straight lines in a homogeneous medium (same properties at every point) and that carry energy independently of one another. A beam is a bundle of rays; a point source emits rays in every direction.
বইগুলো এখনো বাংলা ভাষায় পাওয়া যায় না — ইংরেজি সংস্করণ দেখানো হচ্ছে।
Physics · পরিভাষা