Physics

Q34

A lens which converges a beam of parallel rays to a point is called______________?

Q35

For seeing objects at the surface of water from a submarine under water, the instrument used is ________?

Q36

The famous book “Causes of Indian revolt” was written by __________?

Q38

Color of the glow produced in the discharge tube:

Q39

The hormone that increases the rate of heart beat and blood pressure after shock in a person is___________?

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