system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does polarized mean in the terms of sunglasses.
gpt
Imagine light is a bunch of little frisbees.  


It's not, but bear with me. It's not waves or photons either.

Polarized glasses are like a set of vertical bars. The only frisbees that can get through are the ones tilted on their sides to pass between them.

Most light is randomly oriented, so while a bunch of the frisbees will hit the bars, a lot will also get through. You can see stuff, it's just dimmer.

The trick is when you consider reflections off of things like water. The vertical frisbees will sink into the water instead of bouncing, so the ones that bounce off towards you tend to be about horizontal. These are the ones your glasses mostly block!

So the end result is that polarized glasses tend to make reflections and glares much dimmer.