1. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

2. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

3. Who invented Radiocarbon ?

Answer:

Willard Libby

4. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

5. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

6. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

7. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698