Christiaan Huygens

Born: 14 April 1629,The Hague, Netherlands.
Studied: Mathematics and law at University of Leiden.
INVENTIONS

1.Pendulum clock:-

In a pendulum clock, time is measured by making use of the time taken by its pendulum to complete one oscillation. The pendulum completes one to and fro oscillation in 2 s i.e. it moves from one extreme to the other extreme in ls and then returns from the other extreme to the first extreme in next 1 s.

2.Centrifugal governor:-

A centrifugal governor is a specific type of governor with a feedback system that controls the speed of an engine by regulating the flow of fuel or working fluid, so as to maintain a near-constant speed. It uses the principle of proportional control.

3.Magic lantern:-

A magic lantern is a simple form of image projector that requires a light source, a concave mirror to help intensify and focus the light, and a lens to project a painted picture from a glass slide onto a wall or projection screen.

Death:- 8 July 1695,The Hague, Netherlands by depression illness.