# Polarizing Filter

See how the light changes as it travels through the polarizer. Scientists can make devices that emit photons one at a time, all with the same polarization. They can also use a combination of lenses (similar to those in eyeglasses), mirrors and crystals to manipulate and measure photon polarization. It turns out that polarization is one of the simplest properties of light to work with and so it is commonly used for storing a quantum bit, entangling photons and processing quantum information.

- Kind: Feature
- Year: 2021
- Runtime: 49 h 22 min
- By: Jillian Kunze/The Quantum Atlas
- Archive: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Polarizing_Filter.webm)
- Licence or status: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0) (as the archive states it)
- Credit: Jillian Kunze/The Quantum Atlas
- Who can watch: Teens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/commons/112304281?play=1)