1. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

2. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

3. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

4. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

7. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table