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