how do particles know when they are being observed?
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You think of light as just something we do to see. But light comes in tiny little packets called photons, like marbles. In order to see other tiny particles, we have to shine light on them. The marbles come out of the light source, bounce off the object and back to our eyes. Just like marbles though, when our photon marble hits the object, it changes which way it’s going and how fast.
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