1. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

2. Who invented Radiocarbon ?

Answer:

Willard Libby

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

6. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

7. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903