[Solved] Describe the three branches of the national government and the separation of their powers. Visible Fibers: Fibrous materials or threads that can be seen with the naked eye, often referring to those found in textiles, paper, or other composite materials. Invisible Fibers: Microscopic or very fine fibers that are not visible to the naked eye, which can be natural or synthetic and have various applications, including in textiles and forensic science. Black (UV) Light: Ultraviolet light that is not visible to the human eye but can cause fluorescent materials to glow, often used for amusement or inspection. Security Features: Measures or mechanisms implemented to safeguard against unauthorized access, theft, or damage to property or information.