And particles of sound, known as phonons, are just as susceptible to Heisenberg's uncertainty principle as particles of light (photons) or, indeed, any other fundamental particle.

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Heisenberg's uncertainty principle, one of the central tenets of quantum mechanics, maintains that you cannot pin down all the physical properties of a particle at the same time.

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The precautionary principle, which calls for extra prudence in areas of scientific uncertainty, also applies.

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That is the limit imposed by Heisenberg's famous uncertainty principle (which states that the precision of a time measurement is limited by the precision of a corresponding energy measurement).

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The precautionary principle states that, if there is uncertainty regarding the effects of exposure to an agent, the burden of proof that exposure does not cause harm falls on those who utilize the agent.

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In science, the Uncertainty Principle says that you cannot precisely measure anything past a certain level of precision because the mere act of observing distorts the object of the measurement.

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"Partly for reasons of uncertainty, partly for reasons of practicality and partly for reasons of principle, we should have a decision inside this Parliament and not in the next Parliament, " said Tory MP Bill Cash.

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Einstein had objected to Werner Heisenberg's uncertainty principle and, in general, to the statistics-based, ultimately random foundation of life Bohr was promoting.

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