An atom is in a multi state called ‘superposition’ until you observe it. That’s the only way to know the actual state.
Schrödinger's cat is a thought experiment that places a cat in a black box with poison that gets activated upon the decay of a radioactive atom.
What is the state of the cat?
It is both dead and alive simultaneously (demonstrating the superposition principle), until you open the box and see for sure.
Translation in everyday life:
Do not place your cat in such a box.
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Quantum Physics simplified
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