We constantly say that Einstein’s General and Special theories of relativity have passed many different tests, insenuating their accuracy.
Before Einsten, we tested Isaac Newton’s theories, which also passed with accuracy until Einstein came along.
What’s to say another Einstein/Newton comes along 200-300 years from now to dispute Einstein’s theories?
Is that even possible or are his theories grounded in certainty at this point?
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If you take a substance made of particles that has a half life of say, 1 second, then after 1 second, half of the particles will be left, and the other half will have decayed into something else. Special relativity states that t’ = t/sqrt(1 – (v/c)^2), where t’ is the time that has passed for you, t is the time that has passed for the particles (in their rest frame), and v is the velocity of the particles relative to you. Experimentation has shown that if you move those particles really fast, like 99% the speed of light, when 1 second has passed for you, fewer than half of the particles will have decayed, and the results agree with the equation.
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