| 1.Oxygen ———– Joseph Priestly |
| 2.Positron ———– Anderson |
| 3.Dual nature of electron ——–De Broglie |
| 4.Photo-electric effect———–Einstein |
| 5.Neutrino———–Pauli |
| 6.Tuberculosis causing bacteria—–Robert Koch |
| 7.Atom Bomb——Oppenheimer |
| 8.Atomic Numbers——-Moseley |
| 9.Atomic Theory——-Dalton |
| 10.Calculus——Newton |
| 11.Cloning——Ian Wilmut |
| 12.DNA structure——-Watson & Crick |
| 13.Electron——–J.Thomson |
| 14.Fax machine———Alexander Bain |
| 15.Fountain Pen——–L.E.Waterman |
| 16.Galvanometer——-A.M.Ampere |
| 17.HIV——–Mortagnier |
| 18.Laser——-Gould |
| 19.Lightning Conductor——-Benjamin Franklin |
| 20.Logarithms——–Napier |
| 21.Neutron——–Chadwick |
| 22.Optical Fiber——Narinder Kapany |
| 23.Periodic Table——Mendeleyev |
| 24.Printing Press——-Gutenberg |
| 25.Proton——-Rutherford |
| 26. Quantum Theory—–Planck |
| 27.Radio Telegraphy—–Marconi |
| 28.Telegraph Code——Morse |
| 29.Television——–J.L.Baird |
| 30.Transistor——-Bardeen,Shockley&Brattain |
| 31.Uranium Fission——Fermi |
| 32.X-ray ——Wilhelm Roentgen |
| 33.Bacteris——Leeuwenhock |
| 34.Cholera,T.B germs——-Robert Koch |
| 35.Circulation of blood ——-William Harvey |
| 36.Leprosy Bacillus——–Hansen |
| 37.Penicillin——-Alexander Fleming |
| 38.Rabies vaccine—–Louis Pasteur |
| 39.Rh-factor——–Karl Landsteiner |
| 40.Vaccination——-Edward Jenner |
| 41.Yoga———Patanjali |
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