It All Aboout Time

How humans measure time has changed over the years. This article takes an historical path through measurement of time until the present. This leads the learner to an explanation of electr... See More

How humans measure time has changed over the years. This article takes an historical path through measurement of time until the present. This leads the learner to an explanation of electromagnetic waves and then on to Cesium 131 and how its emission of electromagnetic waves is the present standard for measuring time, hence the atomic clock. Lastly you learn about what adjustment has to be made every so often to compensate for extra seconds. This is an interesting article like many written by this author.

Atomic Clocks

Robertson explains how we measure time in terms of a year is how long it takes the Earth to go around the Sun once, and a month is how long it takes the Moon to go around the Earth once. El... See More

Robertson explains how we measure time in terms of a year is how long it takes the Earth to go around the Sun once, and a month is how long it takes the Moon to go around the Earth once. Electromagnetic waves are introduced and their role in atomic clocks. The discussion on electromagnetic waves and Cesium 33 provide the reader with both background and an understanding of how an atomic clock works. The article is a different kind of read than we usually find from Robertson, but engaging nevertheless.