1. 1700’s The origin of modern scientific disciplines.
2. 1752 Benjamin Franklin proposes the single fluid theory of electricity.3. 1800 Alessandro Volta invents chemical batteries and voltage.
4. 1820 Hans Christan Orsted notices that electric current deflects a magnetized needle.
5. 1821 Michael Faraday shows that changing magnetic field produces electricity.
6. 1840 James Joule and Hermann Von Helmholtz propose that electricity is a form of energy.
7. 1873 James Maxwell presents equations of electromagnetism.
8. 1887 Heinrich Hertz transmits radio waves.
9. 1895 Wilhelm Roentgen discovers X-rays.
10. 1896 Henry Becquerel discovered Radioactivity.
11. 1897 J.J.Thomson discovers the electron.
12. 1898 Pierre and Marie Curie separate radioactive elements.
13. 1900 Max Planck invents the quantum theory of radiation.
14. 1905 Albert Einstein formulate the theory of relativity.
15. 1913 Niels Bohr applies Planck’s theory to the atomic structure.
16. 1923 Erwin Schrodinger’s wave equation.
17. 1927 Max Born and Werner Heisenberg formulate matrix mechanics.
18. 1949 Richard Feynman, Julian Schwinger, and Shin’ichiro Tomonaga formulate quantum electrodynamics.
19. 1967 Steven Weinberg, Sheldon Glashow and Abdus Salam’s formulate unified theory of electromagnetic and weak forces.
20. 1964 Superfluid helium-3 discovered by David Lee.
21. 1986 Discovery of high-temperature superconductivity by Karl Muller and J.Bednorz.
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