1. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

2. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

7. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903