1. Who invented Radiocarbon ?

Answer:

Willard Libby

2. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

3. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

4. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

7. Who invented Electron ?

Answer: Thomson. J of Britain in 1897