1. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

2. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

3. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

4. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

5. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

6. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

7. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765