1. Who invented Hydrogen bomb ?

Answer:

Edward Teller

2. Who invented Submarine ?

Answer:

John Philip Holland

3. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

4. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

5. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.