polerized sun glasses?

Question

were can I find out how polerized sun glasses work

Answer 1

When sunlighht is reflected at a significant angle from a surface the reflected light tends to be partially polarized, meaning that one of the polarization directions of the light is more strongly reflected than the other (which is either transmitted or absorbed by the surface).

A polarizer is an optical element that transmits only one polarization of the light and (depending on the type) either reflects or absorbs the other polarization. The polarizers in polarized sunglasses use a plastic film that absorbs one of the polarizations. They are oriented so that the more strongly reflected polarization will be absorbed by the polarizer. You can see this by looking at reflections from water, pavement, or car windshields. If you rotate the glasses, you will see the reflection decrease in the normal wearing orientation and increase when the glasses are rotated 90 degrees.

The plastic polarizers in sunglasses are made by starting with a thin film of polyvinvyl alcohol (PVA) that is stretched to align the molecules. The film is then treated in an iodine solution. The iodine molecules are incorporated into the PVA film and aligned with the oiented PVA molecules. The iodine treated film is then coated with a clear protective plastic layer to protect it from humidity which would ohterwise bleach the iodine from the film. Light that has its electric field polarized along the direction of the iodine chains is absorbed. Light that is polarized perpendicular to the chains is transmitted.

Answer 2

Research wave optics. Light polerization is a common application in many optical systems.

Answer 3

Cheapest Place for rayban Glasses

Answer 4

Polarised sunglasses reduce the brightness of reflected light, such as you get from the road if you are driving or the sea if you are sailing. They take advantage of the fact that when light is reflected a property of the light waves called the "angle of polarisation" changes. Check out:
http://www.upscale.utoronto.ca/GeneralInterest/Harrison/SternGerlach/Polarisation.html

Answer 5

on the internet.

if you want to check if a pair of sunglasses is polarized at the store. hold 2 of the sunglasses together....but rotate one of the lens 90 degrees and look thru both. if you cant see through it, they are polarized.

Answer 6

try howstuffworks.com. oh if you must know, they are made from a type of carbon that is naturally arranged in parallel lines that blocks light of a certain brightness and direction.