1. Who invented Laser ?

Answer:

Charles H. Townes

2. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

3. Who invented Proton ?

Answer:

Ernest Rutherford

4. Who invented Vitamin K ?

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

5. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

6. Who invented Piano ?

Answer:

Bartolomeo Cristofori

7. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951