1. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

2. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Computer ?

Answer:

Charles Babbage

5. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

6. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

7. Who invented Laser ?

Answer:

Charles H. Townes