Narendra Kumar presents information about composite materials and carbon fiber in his document. Carbon fiber is composed of carbon atoms bonded together into long chains, making it five times stronger than steel, two times stiffer, and two-thirds less weight. It is made of thin carbon strands that can be twisted or woven together. Carbon fiber has high tensile strength, low thermal expansion, low density, and can withstand high temperatures and resistance. It finds applications in aerospace, aircraft, sports equipment, automotive bodies, wind turbines, and construction due to its long life, high strength properties, and lightweight nature. However, it is very costly and potentially harmful if inhaled.