noun🔗ShareستراديانIn the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r2. Symbol: sr"The lamp's reflector concentrates the light into a solid angle of approximately one steradian, providing focused illumination. "يركز عاكس المصباح الضوء في زاوية صلبة تبلغ حوالي واحد ستراديان، مما يوفر إضاءة مركزة.mathphysicsunitChat with AIVocabulary GamePractice Reading
