Horizon Season 2009 Episode 17 How Long is a Piece of String?

Horizon Season 2009 Episode 17, How Long is a Piece of String?, explores the concept of measurement in the modern world. The episode delves deep into the history of measurement, from ancient units such as the cubit to the metric system that is used today. The episode also examines the limitations of measurement that arise due to the uncertainty principle in quantum physics, and the role of measurement in determining the size and shape of the universe.

The episode takes a look at the use of measurement in different contexts, including in the world of sport, where it is used to determine the performance of athletes and to set records. The episode also examines the use of measurement in medicine, where it is used to diagnose conditions and monitor the progress of treatment.

The episode then turns its attention towards the human bias in measurement, exploring how perception can distort measurement and arguing that accurate measurement is not always possible. The episode explains how illusions and cognitive biases can affect our perception of size and shape, leading to inconsistent measurements.

To illustrate this point, the episode features several experiments and demonstrations, such as measuring the length of a piece of string and the length of a shadow. These demonstrations highlight the challenges involved in measuring accurately and the potential for human error.

The episode also explores the concept of infinity and how it relates to measurement. It examines the idea of the infinite continuum, with an explanation of how this concept has been a source of fascination and debate among mathematicians and philosophers throughout history.

Finally, the episode considers the potential impact of measurement on the future of science and technology. It takes a look at the recent developments in quantum computing and how measurement and observation are crucial to the functioning of this emerging technology.

In summary, Horizon Season 2009 Episode 17, How Long is a Piece of String?, is an engaging exploration of the history, limitations, and potential of measurement. It offers a thought-provoking analysis of the role of measurement in different fields and highlights the challenges and biases involved in measuring accurately. The episode raises important questions about the nature of the universe and the future of science and technology.