1. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

2. Who invented Transistor ?

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

3. Who invented Floppy disk ?

Answer: IBM in 1970

4. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

5. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

6. Who invented Calculus ?

Answer: Newton of Britain in 1670.

7. Who invented colour television ?

Answer:

Peter Carl Goldmark