1. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

2. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

3. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

4. Who invented Laser ?

Answer:

Charles H. Townes

5. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

6. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

7. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.