1. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

2. Who invented Submarine ?

Answer:

John Philip Holland

3. Who invented Java Language ?

Answer:

James Gosling

4. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

5. Who invented paper ?

Answer:

Cai Lun

6. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

7. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913