Question

How do water clock and candle clock work

Answer 1

Candle Clock:

There is a tall candle in candle clock. Sharp lines are marked on the candle for the particular time interval.
Let us suppose, difference between the two lines are 1 hour, then when candle is burnt from one line to another we get to know that one hour is passed.

Water Clock:

A water clock, also known as a clepsydra uses a flow of water to measure time. There are two types of water clocks: inflow and outflow. In an outflow water clock, a container is filled with water, and the water is drained slowly and evenly out of the container. This container has markings that are used to show the passage of time. As the water leaves the container, an observer can see where the water is level with the lines and tell how much time has passed. An inflow water clock works in basically the same way, except instead of flowing out of the container, the water is filling up the marked container. As the container fills, the observer can see where the water meets the lines and tell how much time has passed.