The way we measure time has changed over the years, and it’s not just about how we measure time.

It’s also about how accurate our measurements are.

Some people may think that minutes are always 60 seconds long, but that is not true.

There are many different ways to measure time, and a lot of them have their benefits.

The problem is when you have to convert between different measurement units of time because it can get complicated quickly.

First Clock

The water clock was one of the first ways to measure time accurately. It is a clock that measures time by the amount of water that flows from a given container in a certain period.

The oldest known water clock dated back to around 200 BC and was found in Egypt.

The Atomic Clock

The atomic clock is a device that measures the passage of time with extreme accuracy.

This has led to the development other technologies such as GPS, satellite navigation, and wireless communications.

The atomic clock has also improved the accuracy of global timekeeping systems. They use a system of cesium atoms to maintain accuracy for decades.

The first atomic clock was developed in 1955 by Louis Essen and J.W. Horton at National Physical Laboratory in England.

It was based on Einstein’s theory of relativity which states that a pair of clocks moving at different speeds will tell different times when they are reunited after being separated for an extended period.

This is because the cesium atoms oscillate at a constant frequency and are so sensitive that they can measure the passage of time with extreme precision. This is what makes them great for timekeeping.

Our Phones

The GPS on our smartphones is so accurate because it uses a network of satellites that orbit the Earth. These satellites transmit information to our phones such as the time and location.