1. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

2. Who invented Laser ?

Answer:

Charles H. Townes

3. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

6. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

7. Who invented Floppy disk ?

Answer: IBM in 1970