Georg Christoph Lichtenberg

Georg Christoph Lichtenberg pressed electrically charged powder onto a resin plate in 1777 and recorded the first permanent images of electrostatic discharge. These intricate, fern-like patterns, now termed Lichtenberg figures, provided the first physical evidence of the path electricity travels through an insulator. Lichtenberg held the first professorship of experimental physics in Germany at the University of Göttingen from 1769 until his death. His lectures incorporated public demonstrations with apparatus like an enormous electrophorus, drawing crowds that included the young Alexander von Humboldt. Beyond the laboratory, he published the 'Sudelbücher' (Waste Books), over 1,000 pages of aphorisms and observations that critiqued the sentimentalism of his era with a scalpel-like wit. He corresponded with Immanuel Kant and invented the lightning rod's standard design. Lichtenberg's dual legacy established the template for the modern physicist: a rigorous experimentalist who also engages public discourse, with his electrical discovery remaining a foundational demonstration in high-voltage engineering and a tool for diagnosing insulator failures.