Hogfather (Terry David John Pratchett) читать бесплатно онлайн полную версию книги

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A lovely reference to Heisenberg’s Uncertainty Principle. Also plays on the stereotype of the absent-minded old scientist.

Heisenberg’s Uncertainty Principle (HUP) says that for a quantum particle (e.g. an electron), it is impossible to know with complete accuracy both where it is and how fast it is going. The act of observing it interferes with the event you want to measure (in fact, one might say that at the quantum level the observation is the event) in such a way that it is physically impossible to determine both velocity and position of the particle in question.