Professor showing the relativity formula on a chalkboard. Digital illustration.

---

Size: 3200px × 2400px
Photo credit: © Andrea Danti / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: academic, atmosphere, blackboard, board, cartoon, chalkboard, character, classroom, college, communication, draw, drawn, education, einstein, elaborate, equation, evening, explaining, explanation, formula, glasses, hand, idea, illustration, intelligence, law, learning, lecture, light, mood, person, physics, pointing, presentation, professor, relativity, school, science, scientific, scientist, seminar, showing, smart, standing, studying, symbol, teacher, university, warm, warmth, wisdom