polarizing filter

Just like we can filter out some types of sunlight with the polarized coating on our sunglasses, the magnetic field around Sag A* becomes a polarizing filter for all that raw plasma light.

By rotating a polarizing filter, the researchers could mix colors or isolate a single color.

It laminated the touch sensor directly onto the screen and added a polarizing filter, helping to reduce glare and ensuring that the screen looks good at any angle.

If John and I were to exploit entanglement for real, we’d create a pair of entangled photons, he’d take one and I the other, and each of us would send his photon through a polarizing filter and see whether it emerges on the other side.