Photon Spin

Did you know light polarization (the thing that makes you Oakleys amazing) is actually due to a quantum mechanical property known as spin? You might vaguely remember something about electron spin from high school chemistry - photon spin is the same! The only difference is photon has a spin of 1 and an electron as ha 1/2 spin. This means that you can put as many photons as you want in one place but you can only put two electrons in one place (pauli exclusion principle)