1. Who invented Transistor ?

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

2. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented Laser ?

Answer:

Charles H. Townes

5. Who invented Calculus ?

Answer: Newton of Britain in 1670.

6. Who invented Vitamin K ?

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

7. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor