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Uncertain Principles

In short, the states of the Heisenberg uncertainty principle that it is impossible to know both the exact position and exact speed of an object at the same time. However, the effect is tiny and only visible to the subatomic scale.

Werner Heisenberg (1901-1976) was a German physicist who helped formulate quantum mechanics in the early[...]

Through the Wormhole: How Does the Universe Work?

With the help of massive machines called particle accelerators, scientists studied the subatomic realm and made discoveries about the forces that operate at that level. But the search for a full explanation continues. In particular, physicists have tried to find a way to reconcile Einstein's model of space-time, which seems to work best when applied to[...]

How Long Is A Piece Of String?

Alan Davies discovers that to answer that question is much more difficult than originally thought after visiting the mathematician Marcus du Sautoy to help you find an answer. However, this creates more questions, requiring a trip to a place dedicated to the measurement, the National Physical Laboratory. Find the exact length of the test string even[...]