1. Who invented Laser ?

Answer:

Charles H. Townes

2. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

3. Who invented Transistor ?

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

4. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

5. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

6. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

7. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.