1. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

2. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

3. Who invented Atomic Bomb ?

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

4. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

5. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

6. Who invented DNA Structure ?

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

7. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712