Demetrius of Alexandria

Demetrius of Alexandria was an ancient Greek scholar and mathematician who lived around the 3rd century BCE. He is known for his work in astronomy and optics, including the development of early techniques for studying and measuring light and shadow. Demetrius contributed to understanding how lenses and light behave, laying groundwork that influenced later developments in optics and scientific instruments. His work was significant in the context of Hellenistic science, combining observational skills with theoretical insights, and he was part of Alexandria’s rich tradition of scientific inquiry.