Q. Consider the following milestones in the history of Physics: - Discovery of X-rays by Roentgen
- Publication of Newton's Principia Mathematica
- Discovery of electron by J.J. Thomson
- Formulation of Maxwell's equations
Which of the following gives the correct chronological order of these events?
Answer:
2 → 4 → 1 → 3
Notes: Newton's Principia Mathematica was published in 1687. Maxwell's equations were formulated in the 1860s. Wilhelm Roentgen discovered X-rays in 1895, and J.J. Thomson discovered the electron in 1897. Thus, the correct chronological sequence is 2 → 4 → 1 → 3.