Physics Archives - Different Impulse

Quantum vacuum: Less than zero energy

Energy is a quantity that must always be positive — at least that’s what our intuition tells us. If every

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Dark matter, which is thought to account for nearly a quarter of matter in the universe (but has yet to

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The race to further understand and eventually harness the potential power of the quantum world is well underway with each

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ASTRONOMERS have discovered a set of galaxies which, in theory, are “too big and too bright” to exist. The galaxies

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Physicists have revealed that just seven quantum particles can behave as if they were in a crowd of billions. At

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Einstein’s theory of special relativity reflects the unchanging character of the speed of light, among other things. Before Einstein space

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