Here's a rather nice summertime experiment you can do one the beach or anywhere else if you have or can borrow three sets of polarized sunglasses.
With just two pairs of sunglasses, you can see the typical effects of polarized light, but add a third at a diagonal angle and you can see light getting though two oppositely polarized filters which shouldn't be possible.
Classical electromagnetic theory does not predict this, but quantum theory does. Its one of the few cases were you can easily see the direct effects of the probabilistic nature of quanta and particles in contrasting to the effects of EM waves. We also see how this is relates to the Schrödinger's cat thought experiment and the universe possibly splitting at every such "choice".
22 окт 2024