Ключевые слова: at the edge of, balance, clean, continuity, copy space, cube, double refraction, exploration, geometric, glass, glass brick, looking through an object, mirror, neat, no one, nobody, optical instrument, physics, prism, reflectance, reflection, refraction, research, scholarship, science, see through, sides, simple, single object, solid, sparse, square, square shape, stability, symmetry, threedimensional shape, translucent, transparent, volume,