Generate a high-resolution, photorealistic image depicting a distinguished university professor, embodying an air of expertise, in their late 50s to early 60s, wearing smart-casual academic attire such as a tweed jacket or a professional blouse. They are actively engaged in delivering a lecture, perhaps gesturing confidently towards a traditional green chalkboard. This chalkboard should be filled with intricate scientific formulas, theoretical diagrams, or historical timelines, written clearly in white chalk. Beside the professor, on a classic wooden lectern or a sturdy desk, place a stack of open, well-worn academic textbooks, research journals, and a neat pile of annotated papers. The setting is a classic university lecture hall or a dedicated seminar room, bathed in soft, natural light filtering from large arched windows, creating an atmosphere of intellectual gravitas and focused learning. The composition should be a medium shot, focusing on the professor from the waist up, the chalkboard, and the immediate lecture area, conveying depth in the background elements of the room.