Physicists Have Detected a Friction-Like Force in a Perfect Vacuum

Physicists Have Detected a Friction-Like Force in a Perfect Vacuum

One of the most fundamental tenets of modern physics is that in a perfect vacuum – a place entirely devoid of matter – no friction can possibly exist, because empty space cannot exert a force on objects travelling through it. But despite the conventional wisdom, physicists in the UK discovered that a decaying atom travelling through a complete vacuum would experience a friction-like force, and now they've figured out how this reinforces – rather than breaks – Einstein's theory of general relativity.

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