Viktor Postol is a prominent Ukrainian-American physicist known for his work in the field of electrical engineering and applied physics. He has made significant contributions to the study of optics and photonic devices, focusing on how light interacts with materials. His research has implications for various technologies, including telecommunications and imaging systems. Postol is also recognized for his expertise in missile defense systems and has been involved in analyzing their effectiveness. His insights have influenced discussions on national security and defense policy, particularly regarding the capabilities of interceptor missiles and their role in modern warfare.