Multiple choice general knowledge science & technology Laws of Gravitation Sir Isaac Newton Sir J.J. Thompson Christian Barnard Michael Faraday Reveal answer Fill a bubble to check yourself A Correct answer Explanation Isaac Newton formulated the Law of Universal Gravitation in 1687, published in his Principia Mathematica. J.J. Thompson discovered the electron, Christian Barnard was a heart surgeon, and Michael Faraday worked on electromagnetism.