Some light quantum mechanics (with minutephysics)
3Blue1BrownYouTube ↗
Further reading 1
Caption notes
A polarization component is not a promise about an individual photon. The measurement selects a basis and the squared component magnitude gives the probability of the corresponding outcome.
Video or transcript source ↗Original passages · 2
the probability that a photon whose polarization is 22.5 degrees off the direction of a filter will pass through that filterthe choice of how to measure these objects can determine a set of base states