I’ve had like 12 people explain this to me and have absolutely no idea what polarized glasses are or why they’re so special.
In: Engineering
Light is made up of photon, and the oscilate in a certain direction. Literally any angle perpendicular to the way they travel.
When you have a normal stream of light, there are so many photons that the light is basically oscillating in all directions.
If we put a polarizing filter in the way of the light, only light that is aligned with the filter can get through.
Sun glasses are usually polarized vertically (up and down) because horizontal light is more likely to scatter when hitting a surface, especially water, causing a glare. If you turn your head sideways while looking through polarized sunglasses, you’ll notice they don’t work as well.
3D glasses are also polarized, one horizontal and one vertical, so the projector can output two images on the screen using horizontal and vertical light, the glasses filter out the alternate image, and your brain constructs a 3D image from the information reaching your brain.
If you have two pairs of polarized sun glasses, and turn one 90° from the other, no light can get through and the second pair of glasses will appear black, because no light can pass through both filters.
Similarly, with 3D glasses, if you put them on and close one eye, another pair of 3D glasses will have the other lens blacked out for the same reason
Latest Answers