Ключевые слова: apple, concept, curiosity, diffraction, education, face, famous, force, formula, gravity, great, history, idea, isaac, knowledge, law, laws, learning, light, man, mathematician, mechanics, nature, newton, newtons, old, optical, optics, physical, physicist, physics, portrait, prism, refraction, science, scientific, scientist, second, sir, study, symbol, teach, velocity,