1. Who invented Laser ?

Answer:

Charles H. Townes

2. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

3. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

4. Who invented Piano ?

Answer:

Bartolomeo Cristofori

5. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

6. Who invented Proton ?

Answer:

Ernest Rutherford

7. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903