| Discovery | Scientist | Year |
| Electron | J.J.Thomson | 1897 |
| Proton | Rutherford | 1919 |
| Neutron | James Dalton | 1932 |
| Atom | John Dalton | 1808 |
| Atomic Structure | Neil Bohr &Rutherford | 1913 |
| Laws of Motion | Newton | 1687 |
| Radioactivity | Henry Becquerel | 1896 |
| Radium | Madam Curie | 1898 |
| Principle of Relativity | Albert Einstein | 1905 |
| Electromagnetic Induction | Michael Faraday | 1831 |
| Raman Effect | C.V. Raman | 1928 |
| X-Rays | Roentgen | 1895 |
| Quantum theory | Max Plank | 1900 |
| Photo electric effect | Albert Einstein | 1905 |
| Law of Electrostatic attraction | Coulomb | 1779 |
| Photography (On metal) | J. Neepse | 1826 |
| Photography (On Paper) | W. Fox Talbot | 1835 |
| Periodic table | Mandeleev | 1888 |
| Law of Electric resistance | G.S, Ohm | 1827 |
| Law of floatation | Archemedes | 1827 |
| Thermionic emission | Edition | ——– |
| Diode Bulb | Sir J.S. Fleming | 1904 |
| Triode Bulb | Lee de Forest | 1906 |
| Nuclear Reactor | Anrico Fermi | 1942 |
| Law of electrolytic dissociation | Faraday | ——— |
| Wireless Telegram | Marconi | 1901 |
| Dynamite | Alfred Nobel | 1867 |
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